Add maps for Melksham line and Trowbridge Lines. Complete Reading-Bristol and improve inter-map links

static/mapFiles/yaml/0250.yaml

@@ -0,0 +1,126 @@
+routeStart: Thingley Junction
+routeEnd: Bradford Junction
+routeId: "0250"
+updated: 2026-03-01
+checked: 2026-03-01
+signallerStart: TVSC Swindon WS
+signallerEnd: Westbury PSB
+elecStart:
+  elec: none
+elecEnd:
+  elec: none
+
+routeDetail:
+
+- type: continues
+  routeName: Reading - Bristol TM
+  routeId: "0002"
+  entryPoint: thingley-jn
+
+- type: junction
+  name: Thingley Jn
+  diverges: left
+  direction: down
+  description: Down Main towards Bath
+  goto: "0002"
+  entryPoint: thingley-jn
+  miles: 96
+  chains: 10
+
+- type: signallerChange
+  from: TVSC Swindon WS (SW)
+  to: Westbury PSB (W)
+  miles: 96
+  chains: 30
+
+- type: crossing
+  name: Laycock 6 Foot Crossing
+  kind: foot
+  miles: 97
+  chains: 30
+
+- type: crossing
+  name: Laycock 2 Foot Crossing
+  kind: foot
+  miles: 98
+  chains: 8
+
+- type: crossing
+  name: Melksham Without 85 Foot Crossing
+  kind: foot
+  miles: 99
+  chains: 12
+
+- type: crossing
+  name: Melksham Without 92 Foot Crossing
+  kind: foot
+  miles: 99
+  chains: 41
+
+- type: station
+  name: Melksham
+  miles: 100
+  chains: 13
+
+- type: crossing
+  kind: foot
+  name: Melksham 22 Foot Crossing
+  miles: 100
+  chains: 32
+
+- type: crossing
+  kind: uwc
+  miles: 101
+  chains: 39
+  name: Church Farm No.1 Crossing
+
+- type: crossing
+  kind: foot
+  name: Broughton Gifford No.26 Foot Crossing
+  miles: 101
+  chains: 77
+
+- type: crossing
+  kind: foot
+  name: Broughton Gifford No.25 Foot Crossing
+  miles: 102
+  chains: 2
+
+- type: crossing
+  kind: uwc
+  name: Church Farm No.2 Crossing
+  miles: 102
+  chains: 10
+
+- type: crossing
+  kind: foot
+  name: Holt No.1 Foot Crossing
+  miles: 102
+  chains: 23
+
+- type: siteof
+  name: Holt Junction
+  description: Former junction
+  miles: 102
+  chains: 58
+
+- type: crossing
+  kind: uwc
+  name: Avon View Farm Crossing
+  miles: 103
+  chains: 9
+
+- type: junction
+  name: Bradford Jn
+  diverges: left
+  direction: up
+  description: Up/Dn Trowbridge towards Bath
+  goto: "0260"
+  entryPoint: bradford-jn
+  miles: 104
+  chains: 40
+
+- type: continues
+  routeName: Bathampton Jn - Westbury
+  routeId: "0260"
+  entryPoint: bradford-jn