diff --git a/src/background/ticker.go b/src/background/ticker.go
index 2eee8ac..a2b1abe 100644
--- a/src/background/ticker.go
+++ b/src/background/ticker.go
@@ -9,7 +9,7 @@ import (
 	"git.fjla.uk/owlboard/timetable-mgr/log"
 )
 
-const frequency = 3 * time.Second // Figure out a sensible frequency!
+const frequency = 600 * time.Hour // Figure out a sensible frequency!
 
 // Starts a background ticker to run background tasks.  Uses the frequency configured in the background/ticker.go file
 func InitTicker(cfg *helpers.Configuration, stop <-chan struct{}) {
@@ -27,7 +27,7 @@ func runTicker(cfg *helpers.Configuration, stop <-chan struct{}) {
 		case <-stop:
 			return
 		case <-ticker.C:
-			go cif.CifCheck(cfg)
+			go cif.CheckCif(cfg)
 			go corpus.CheckCorpus(cfg)
 		}
 	}
diff --git a/src/cif/check.go b/src/cif/check.go
index b6e7868..054ddd3 100644
--- a/src/cif/check.go
+++ b/src/cif/check.go
@@ -41,13 +41,45 @@ func parseMetadata(metadata *dbAccess.CifMetadata, cfg *helpers.Configuration) e
 	}
 
 	log.Msg.Debug("Requesting CIF Data Update")
-	newMeta, err := runUpdate(metadata, cfg)
+	// When testing done, this function returns newMetadata which needs putting into DB
+	_, err := runUpdate(metadata, cfg)
 	if err != nil {
 		return err
 	}
-	ok := dbAccess.PutCifMetadata(*newMeta)
-	if !ok {
-		log.Msg.Error("CIF Data updated but Metadata Update failed")
-	}
+	//ok := dbAccess.PutCifMetadata(*newMeta)
+	//if !ok {
+	//	log.Msg.Error("CIF Data updated but Metadata Update failed")
+	//}
 	return nil
 }
+
+// Checks if the CIF Data needs updating, and what type of update is needed (Full/Partial) and if partial
+// what days data needs updating, then calls an update function to handle the update.
+func CheckCif(cfg *helpers.Configuration) {
+	// Check that it is after 0600, if not then skip update
+	// Not written yet
+
+	log.Msg.Info("Checking age of CIF Data")
+
+	// Load and read metadata from database
+	metadata, err := dbAccess.GetCifMetadata()
+	if err != nil {
+		log.Msg.Error("Unable to read last update time")
+		return
+	}
+
+	if metadata == nil {
+		log.Msg.Info("Full CIF download required")
+		err := runCifFullDownload(cfg)
+		if err != nil {
+			log.Msg.Error("Unable to run full CIF Update")
+			return
+		}
+		return
+	}
+
+	// Check if last update was before today
+
+	// Here I need to determine which days I need to update CIF data for, then pass to an appropriate function:
+	// newMetadata, err := runCifUpdate(days []time.Time, cfg)
+}
diff --git a/src/cif/parse.go b/src/cif/parse.go
new file mode 100644
index 0000000..46f0fe7
--- /dev/null
+++ b/src/cif/parse.go
@@ -0,0 +1,64 @@
+package cif
+
+import (
+	"bytes"
+	"encoding/json"
+
+	"git.fjla.uk/owlboard/go-types/pkg/upstreamApi"
+	"git.fjla.uk/owlboard/timetable-mgr/log"
+	"go.uber.org/zap"
+)
+
+// Unmarshalls data into the correct types for processing
+func parseCifData(data []byte) (*parsedData, error) {
+	// Split the data into lines
+	lines := bytes.Split(data, []byte("\n"))
+
+	// Initialise variable for the parsed data
+	var parsed parsedData
+	parsed.assoc = make([]upstreamApi.JsonAssociationV1, 0)
+	parsed.sched = make([]upstreamApi.JsonScheduleV1, 0)
+
+	for _, line := range lines {
+
+		// Skip empty lines to avoid logging errors when there is no error
+		if len(bytes.TrimSpace(line)) == 0 {
+			continue
+		}
+
+		// Map each line for processing
+		var obj map[string]json.RawMessage
+		if err := json.Unmarshal(line, &obj); err != nil {
+			log.Msg.Error("Error decoding line", zap.String("line", string(line)), zap.Error(err))
+			continue
+		}
+
+		// Loop through the mapped data and unmarshal to the correct type
+		for key, value := range obj {
+			switch key {
+			case "JsonTimetableV1":
+				var timetable upstreamApi.JsonTimetableV1
+				if err := json.Unmarshal(value, &timetable); err != nil {
+					log.Msg.Error("Unable to parse JSON Timetable", zap.Error(err), zap.String("line", string(value)))
+					continue
+				}
+				parsed.header = timetable
+			case "JsonAssociationV1":
+				var association upstreamApi.JsonAssociationV1
+				if err := json.Unmarshal(value, &association); err != nil {
+					log.Msg.Error("Error decoding JSON Association", zap.Error(err))
+					continue
+				}
+				parsed.assoc = append(parsed.assoc, association)
+			case "JsonScheduleV1":
+				var schedule upstreamApi.JsonScheduleV1
+				if err := json.Unmarshal(value, &schedule); err != nil {
+					log.Msg.Error("Error decoding JSON Schedule", zap.Error(err))
+					continue
+				}
+				parsed.sched = append(parsed.sched, schedule)
+			}
+		}
+	}
+	return &parsed, nil
+}
diff --git a/src/cif/process.go b/src/cif/process.go
index 185ca6e..6189e5a 100644
--- a/src/cif/process.go
+++ b/src/cif/process.go
@@ -1,17 +1,21 @@
 package cif
 
 import (
-	"git.fjla.uk/owlboard/go-types/pkg/upstreamApi"
+	"errors"
+
 	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
 )
 
-// Probably looking to return some kind of array, containing the database actions.  Associations aren't needed at the moment.
-// however, maybe I need to process them too.  I need to plan how to return the data properly.
-func parseCifData(data []byte, metadata *dbAccess.CifMetadata) (*[]upstreamApi.CifScheduleSegment, error) {
+// Processes all data in the schedule segment of 'data', interacts with the database and returns new metadata
+func processCifData(metadata *dbAccess.CifMetadata, data *parsedData) (*dbAccess.CifMetadata, error) {
+	if data == nil {
+		err := errors.New("data is not defined")
+		return nil, err
+	}
+	if metadata == nil {
+		err := errors.New("metadata is not defined")
+		return nil, err
+	}
+
 	return nil, nil
 }
-
-// Handles documents from CIF and VSTP Feeds.
-// Takes in individual documents, and returns them in the correct format for the Database
-// Uses types declared in owlboard/go-types/db
-func DocumentHandler() {}
diff --git a/src/cif/types.go b/src/cif/types.go
index b78f248..48aaa28 100644
--- a/src/cif/types.go
+++ b/src/cif/types.go
@@ -1,7 +1,10 @@
 package cif
 
-// I believe that this is not used, instead I opted for the CifMetadata type.
-type CIFUpdate struct {
-	Timestamp int64
-	Sequence  int64
+import "git.fjla.uk/owlboard/go-types/pkg/upstreamApi"
+
+// Holds parsed data for processing
+type parsedData struct {
+	header upstreamApi.JsonTimetableV1
+	assoc  []upstreamApi.JsonAssociationV1
+	sched  []upstreamApi.JsonScheduleV1
 }
diff --git a/src/cif/update.go b/src/cif/update.go
index 7d78c88..939fc52 100644
--- a/src/cif/update.go
+++ b/src/cif/update.go
@@ -82,21 +82,25 @@ func runUpdate(metadata *dbAccess.CifMetadata, cfg *helpers.Configuration) (*dbA
 			log.Msg.Error("Error fetching data", zap.Time("date", date))
 			continue
 		} // parseCifData function needs writing
-		parsedData, err := parseCifData(data, metadata)
+		parsedData, err := parseCifData(data)
 		if err != nil {
 			log.Msg.Error("Error parsing data", zap.Time("date", date))
 		}
-		// Apply data to Database
+
+		if parsedData == nil { // TEMPORARY DEVELOPMENT CHECK
+			log.Msg.Error("No data parsed")
+			return nil, nil
+		}
+
+		// Process data (manages the database interactions and >>returns the new metadata)
+		_, err = processCifData(metadata, parsedData)
+		if err != nil {
+			log.Msg.Error("Error processing CIF Data", zap.Error(err))
+		}
+
 		log.Msg.Info("CIF Data updated", zap.Time("date", date))
 	}
-
-	// Use the values in metadata to determine which day to attempt to update.
-	// First check if the last update was today, if so, I can return nil, nil - No update required
-	////// If the update was on the previous day, download todays data and check the sequence number and timestamp indicate that todays data is the next file that I need.
-	////// If the sequence number and timestamp indicate I have missed a day, download that days data first, then todays.
-
-	// Write a parsing function that can handle VSTP as well as SCHEDULE data
-	// Handle database management
+	return nil, nil //TEMPORARY
 }
 
 // Fetches CIF Updates for a given day
diff --git a/src/corpus/check.go b/src/corpus/check.go
index b6d917b..1eb2c8c 100644
--- a/src/corpus/check.go
+++ b/src/corpus/check.go
@@ -9,7 +9,7 @@ import (
 	"go.uber.org/zap"
 )
 
-// Checks if the CORPUS Data needs updating, and carrys out the process if needed
+// Checks if the CORPUS Data needs updating, and calls an updater function if needed.
 func CheckCorpus(cfg *helpers.Configuration) {
 	log.Msg.Debug("Checking age of CORPUS Data")
 	utime, err := dbAccess.CheckUpdateTime(dbAccess.CorpusCollection)
@@ -29,9 +29,11 @@ func CheckCorpus(cfg *helpers.Configuration) {
 		err := RunCorpusUpdate(cfg)
 		if err != nil {
 			log.Msg.Warn("CORPUS Update did not run")
+		} else {
+			log.Msg.Info("CORPUS data has been updated")
 		}
 	} else {
-		log.Msg.Info("CORPUS Data is less than two weeks old")
+		log.Msg.Info("CORPUS Data is less than two weeks old, not updating")
 	}
 }
 
diff --git a/src/corpus/constants.go b/src/corpus/constants.go
new file mode 100644
index 0000000..cb64335
--- /dev/null
+++ b/src/corpus/constants.go
@@ -0,0 +1,4 @@
+package corpus
+
+// The download URL for CORPUS data
+const url string = "https://publicdatafeeds.networkrail.co.uk/ntrod/SupportingFileAuthenticate?type=CORPUS"
diff --git a/src/corpus/fetch.go b/src/corpus/parse.go
similarity index 79%
rename from src/corpus/fetch.go
rename to src/corpus/parse.go
index 10b6b3a..ba60865 100644
--- a/src/corpus/fetch.go
+++ b/src/corpus/parse.go
@@ -5,25 +5,10 @@ import (
 	"errors"
 
 	"git.fjla.uk/owlboard/go-types/pkg/database"
-	"git.fjla.uk/owlboard/timetable-mgr/helpers"
 	"git.fjla.uk/owlboard/timetable-mgr/log"
-	"git.fjla.uk/owlboard/timetable-mgr/nrod"
 	"go.uber.org/zap"
 )
 
-const url string = "https://publicdatafeeds.networkrail.co.uk/ntrod/SupportingFileAuthenticate?type=CORPUS"
-
-// Fetches CORPUS Data using the nrod.NrodDownload() function and returns the byte array
-func fetchCorpus(cfg *helpers.Configuration) (*[]byte, error) {
-	log.Msg.Info("Fetching CORPUS Data")
-	data, err := nrod.NrodDownload(url, cfg)
-	if err != nil {
-		log.Msg.Error("Corpus update failed")
-		return nil, err
-	}
-	return &data, nil
-}
-
 // Accepts CORPUS data as a byte array and formats it ready for database insertion
 func parseCorpusData(jsonData *[]byte) ([]database.CorpusEntry, error) {
 	log.Msg.Info("Unmarshalling CORPUS Data")
diff --git a/src/corpus/update.go b/src/corpus/update.go
index fea5ded..a9053d3 100644
--- a/src/corpus/update.go
+++ b/src/corpus/update.go
@@ -4,18 +4,19 @@ import (
 	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
 	"git.fjla.uk/owlboard/timetable-mgr/helpers"
 	"git.fjla.uk/owlboard/timetable-mgr/log"
+	"git.fjla.uk/owlboard/timetable-mgr/nrod"
 	"go.uber.org/zap"
 )
 
 // Runs all stages of the CORPUS Update process
 func RunCorpusUpdate(cfg *helpers.Configuration) error {
-	resp, err := fetchCorpus(cfg)
+	resp, err := nrod.NrodDownload(url, cfg)
 	if err != nil {
-		log.Msg.Error("Failed to update Corpus data", zap.Error(err))
+		log.Msg.Error("Failed to fetch CORPUS data", zap.Error(err))
 		return err
 	}
 
-	unsortedCorpusData, err := parseCorpusData(resp)
+	unsortedCorpusData, err := parseCorpusData(&resp)
 	if err != nil {
 		log.Msg.Error("Error parsing Corpus data", zap.Error(err))
 		return err
@@ -27,19 +28,23 @@ func RunCorpusUpdate(cfg *helpers.Configuration) error {
 	if err := dbAccess.DropCollection(dbAccess.CorpusCollection); err != nil {
 		log.Msg.Warn("CORPUS data may be incomplete")
 		log.Msg.Error("Error dropping CORPUS Data", zap.Error(err))
+		return err
 	}
 	if err := dbAccess.DropCollection(dbAccess.StationsCollection); err != nil {
 		log.Msg.Warn("Stations data may be incomplete")
 		log.Msg.Error("Error dropping stations Data", zap.Error(err))
+		return err
 	}
 
 	if err := dbAccess.PutManyCorpus(corpusData); err != nil {
 		log.Msg.Warn("CORPUS data may be incomplete")
 		log.Msg.Error("Error inserting CORPUS Data", zap.Error(err))
+		return err
 	}
 	if err := dbAccess.PutManyStations(stationData); err != nil {
 		log.Msg.Warn("Stations data may be incomplete")
 		log.Msg.Error("Error inserting stations data", zap.Error(err))
+		return err
 	}
 
 	return nil
diff --git a/src/dbAccess/access.go b/src/dbAccess/access.go
index 3c6e522..c9e6759 100644
--- a/src/dbAccess/access.go
+++ b/src/dbAccess/access.go
@@ -16,6 +16,7 @@ const timetableCollection string = "timetable"
 
 // CAUTION: Drops the collection named in collectionName
 func DropCollection(collectionName string) error {
+	log.Msg.Info("Dropping collection", zap.String("Collection Name", collectionName))
 	database := MongoClient.Database(databaseName)
 	collection := database.Collection(collectionName)
 
diff --git a/src/go.mod b/src/go.mod
index 46fc85c..ab3477c 100644
--- a/src/go.mod
+++ b/src/go.mod
@@ -3,7 +3,7 @@ module git.fjla.uk/owlboard/timetable-mgr
 go 1.21
 
 require (
-	git.fjla.uk/owlboard/go-types v0.0.0-20240331204922-8f8899eb6072
+	git.fjla.uk/owlboard/go-types v0.0.0-20240403200521-41796e25b6c3
 	github.com/go-stomp/stomp/v3 v3.0.5
 	go.mongodb.org/mongo-driver v1.12.0
 	go.uber.org/zap v1.24.0
diff --git a/src/go.sum b/src/go.sum
index 0b7ceba..f341a2b 100644
--- a/src/go.sum
+++ b/src/go.sum
@@ -2,6 +2,8 @@ git.fjla.uk/owlboard/go-types v0.0.0-20240326154559-f85646ac1a58 h1:8r1oGpD1yG4J
 git.fjla.uk/owlboard/go-types v0.0.0-20240326154559-f85646ac1a58/go.mod h1:kG+BX9UF+yJaAVnln/QSKlTdrtKRRReezMeSk1ZLMzY=
 git.fjla.uk/owlboard/go-types v0.0.0-20240331204922-8f8899eb6072 h1:QjaTVm4bpnXZPrYmJUQhBaaWFVHwpDzKb78wX0xcZu0=
 git.fjla.uk/owlboard/go-types v0.0.0-20240331204922-8f8899eb6072/go.mod h1:kG+BX9UF+yJaAVnln/QSKlTdrtKRRReezMeSk1ZLMzY=
+git.fjla.uk/owlboard/go-types v0.0.0-20240403200521-41796e25b6c3 h1:veGmL8GeWsgGCeTgPPSDw5tbUr1pUz8F6DBgFMf6IGc=
+git.fjla.uk/owlboard/go-types v0.0.0-20240403200521-41796e25b6c3/go.mod h1:kG+BX9UF+yJaAVnln/QSKlTdrtKRRReezMeSk1ZLMzY=
 github.com/benbjohnson/clock v1.1.0 h1:Q92kusRqC1XV2MjkWETPvjJVqKetz1OzxZB7mHJLju8=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
diff --git a/src/main.go b/src/main.go
index d2e37a2..8aac05c 100644
--- a/src/main.go
+++ b/src/main.go
@@ -9,6 +9,7 @@ import (
 	_ "time/tzdata"
 
 	"git.fjla.uk/owlboard/timetable-mgr/background"
+	"git.fjla.uk/owlboard/timetable-mgr/corpus"
 	"git.fjla.uk/owlboard/timetable-mgr/dbAccess"
 	"git.fjla.uk/owlboard/timetable-mgr/helpers"
 	"git.fjla.uk/owlboard/timetable-mgr/log"
@@ -39,8 +40,8 @@ func main() {
 	// Start CIF Task Ticker
 	background.InitTicker(cfg, stop)
 
-	// Test Corpus Fetching
-	//corpus.RunCorpusUpdate(cfg)
+	// Test CORPUS Fetching
+	go corpus.CheckCorpus(cfg)
 
 	if cfg.VstpOn {
 		messaging.StompInit(cfg)
diff --git a/src/timetable-mgr b/src/timetable-mgr
deleted file mode 100755
index 910a529..0000000
Binary files a/src/timetable-mgr and /dev/null differ