From 88b75e3e622513e56812a372d93052e416e1ba1f Mon Sep 17 00:00:00 2001
From: Fred Boniface <fjla@fredboniface.co.uk>
Date: Thu, 2 Apr 2026 11:20:50 +0100
Subject: [PATCH] Add additional codes, 4601 & 6594

---
 README.md      | 15 +++++++++++++++
 pis/codes.yaml |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/README.md b/README.md
index 952b6f4..c3798f2 100644
--- a/README.md
+++ b/README.md
@@ -6,6 +6,21 @@ Re-initialised in a new repository on 04/12/2025.  This decision was made to kee
 
 Data is prepared for the data-ingress service using Gitea actions, any changes made to the actions require care to ensure it doesn't break the ingress of data to OwlBoard.
 
+## Making Changes
+
+Updates should be made in a branch following the naming pattern:
+
+```
+branches:
+- auto-*
+- pis-*
+```
+
+Updated should be placed in to a new file in the /pis/ directory.
+
+Code deletions must be made in the 'main' branch.
+
+
 ## Future Considerations
 
 Adding traction type field to cover 80x generic headcodes, and whatever 175's use if not the same as other units.
\ No newline at end of file
diff --git a/pis/codes.yaml b/pis/codes.yaml
index fa0bf33..1d9d39d 100644
--- a/pis/codes.yaml
+++ b/pis/codes.yaml
@@ -1,4 +1,8 @@
 pis:
+  - code: "4601"
+    stops: [cdf,nwp,stj,fit,bri,bth,boa,tro,wsb,wmn,sal,rom,sou,frm]
+  - code: "6594"
+    stops: [gcr,yae,bpw,fit,asd,srd,lwh,bri]
   - code: "0106"
     stops: [slo,wnc]
     toc: "gw"