Begin typescript transition

src/lib/stores/tocMap.ts

@@ -13,6 +13,7 @@ const tocMap = {
   ht: 'Hull Trains',
   tl: 'Thameslink',
   gc: 'Grand Central',
+  gx: 'Gatwick Express',
   hx: 'Heathrow Express',
   ls: 'Locomotive Services Limited',
   me: 'Merseyrail',
@@ -35,7 +36,18 @@ const tocMap = {
   ld: 'Lumo',
   so: 'Rail Adventure',
   ln: 'Grand Union Trains',
-  zz: 'Freight/Charter Company'
+  zz: 'Freight/Charter Company',
+  wm: 'West Midlands Railway (WMT)',
+  uk: 'Unknown Operator'
 };
 
-export default tocMap;
+const tocs = new Map<string, string>([
+  ['uk', 'Unknown Operator'],
+  ['wm', 'West Midlands Railway (WMT)'],
+  ['zz', 'Freight/Charter Operation'],
+  ['ln', 'Grand Union Trains'],
+  ['so', 'Rail Adventure']
+])
+
+export default tocMap;
+export { tocs }