Now this is nerdiness on a whole new level, but here are the TfL routes that still pass through the remaining Tory seats in London & the home counties...
5 - Romford constituency
20 - Chingford & Woodford Green and Epping Forest constituencies
32 - Harrow East constituency (towards Edgware)
34 - Chingford & Woodford Green constituency (towards Walthamstow)
51 - Orpington and Old Bexley & Sidcup constituencies
60 - Croydon South constituency
61 - Bromley & Biggin Hill and Orpington constituencies
64 - Croydon South constituency
66 - Romford constituency
79 - Harrow East constituency
83 - Harrow East constituency
86 - Romford constituency
96 - Old Bexley & Sidcup constituency
89 - Old Bexley & Sidcup constituency
97 - Chingford & Woodford Green constituency
103 - Romford constituency
107 - Harrow East (towards Barnet) and Hertsmere constituencies
114 - Ruislip, Northwood & Pinner and Harrow East constituencies
116 - Spelthorne constituency
117 - Spelthorne constituency
119 - Bromley & Biggin Hill and Croydon South (towards Purley Way) constiuencies
123 - Chingford & Woodford Green constituency (towards Ilford)
126 - Bromley & Biggin Hill constituency
127 - Croydon South constituency
128 - Romford constituency
132 - Old Bexley & Sidcup constituency
138 - Bromley & Biggin Hill constituency
142 - Hertsmere constituency
146 - Bromley & Biggin Hill constituency
150 - Epping Forest constituency
158 - Chingford & Woodford Green constituency
160 - Old Bexley & Sidcup constituency
162 - Bromley & Biggin Hill constituency
165 - Hornchurch & Upminster and Romford constituencies
166 - Croydon South and Reigate constituencies
167 - Epping Forest constituency
174 - Romford constituency
175 - Romford constituency
179 - Chingford & Woodford Green constituency
182 - Harrow East constituency
183 - Ruislip, Northwood & Pinner and Harrow East constituencies
186 - Harrow East constituency
193 - Hornchurch & Upminster and Romford constituencies
194 - Croydon South constituency (towards Croydon)
198 - Croydon South constituency (towards Thornton Heath)
203 - Spelthorne constituency
204 - Harrow East constituency
208 - Bromley & Biggin Hill and Orpington constituencies
212 - Chingford & Woodford Green constituency
215 - Chingford & Woodford Green and Epping Forest constituencies
216 - Spelthorne constituency
217 - Broxbourne constiuency
227 - Bromley & Biggin Hill constituency
229 - Old Bexley & Sidcup constituency
233 - Old Bexley & Sidcup and Sevenoaks constituencies
235 - Spelthorne constituency
245 - Harrow East constituency
246 - Bromley & Biggin Hill and Sevenoaks constituencies
247 - Romford constituency
248 - Romford and Hornchurch & Upminster constituencies
251 - Harrow East constituency (towards Edgware)
252 - Romford and Hornchurch & Upminster constituencies
256 - Romford and Hornchurch & Upminster constituencies
258 - Harrow East and Hertsmere constituencies
261 - Bromley & Biggin Hill and Orpington constituencies
269 - Bromley & Biggin Hill and Old Bexley & Sidcup constituencies
273 - Orpington constituency
275 - Chingford & Woodford Green and Epping Forest constituencies
278 - Ruislip, Northwood & Pinner constituency
279 - Broxbourne constituency
282 - Ruislip, Northwood & Pinner constiuency
286 - Old Bexley & Sidcup constituency
288 - Harrow East constituency
290 - Spelthorne constituency
292 - Harrow East (towards Borehamwood) and Hertsmere constituencies
294 - Romford constituency
296 - Romford constituency
298 - Hertsmere constituency
302 - Harrow East constituency
303 - Harrow East constituency
312 - Croydon South constituency
313 - Chingford & Woodford Green and Hertsmere constituencies
314 - Bromley & Biggin Hill constituency
317 - Broxbourne constituency
320 - Bromley & Biggin Hill constituency
321 - Old Bexley & Sidcup and Orpington constituencies
324 - Harrow East and Hertsmere constituencies
327 - Broxbourne constituency
331 - Beaconsfield, South West Hertfordshire and Ruislip, Northwood & Pinner constituencies
336 - Bromley & Biggin Hill and Orpington constituencies
340 - Harrow East constituency
346 - Hornchurch & Upminster constituency
347 - Romford and Hornchurch & Upminster constituencies
352 - Bromley & Biggin Hill constituency
353 - Bromley & Biggin Hill and Orpington constituencies
354 - Bromley & Biggin Hill constituency
357 - Chingford & Woodford Green constituency
358 - Bromley & Biggin Hill and Orpington constituencies
359 - Croydon South constituency
365 - Romford and Hornchurch & Upminster constituencies
367 - Bromley & Biggin Hill constituency
370 - Romford and Hornchurch & Upminster constituencies
372 - Hornchurch & Upminster constituency
375 - Romford and Epping Forest constituencies
379 - Chingford & Woodford Green constituency
385 - Chingford & Woodford Green constituency
397 - Chingford & Woodford Green and Epping Forest constituencies
398 - Ruislip, Northwood & Pinner constituency
403 - Croydon South and East Surrey constituencies
404 - Croydon South and East Surrey constituencies
405 - Croydon South, East Surrey and Reigate constituencies
407 - Croydon South and East Surrey constituencies
412 - Croydon South constituency
422 - Old Bexley & Sidcup constituency
433 - Croydon South constituency
434 - Croydon South and East Surrey constituencies
439 - Croydon South and East Surrey constituencies
444 - Chingford & Woodford Green constituency
462 - Epping Forest constituency
463 - Croydon South constituency
464 - Bromley & Biggin Hill and East Surrey constituencies
466 - Croydon South constituency
468 - Croydon South constituency
486 - Old Bexley & Sidcup constituency
491 - Broxbourne constituency
492 - Old Bexley & Sidcup constituency
496 - Romford and Hornchurch & Upminster constituencies
498 - Romford, Hornchurch & Upminster and Brentwood & Ongar constituencies
499 - Romford constituency
B12 - Old Bexley & Sidcup constituency
B13 - Old Bexley & Sidcup constituency
B14 - Orpington and Old Bexley & Sidcup constituencies
B15 - Old Bexley & Sidcup constituency
B16 - Old Bexley & Sidcup constituency
H11 - Ruislip, Northwood & Pinner constituency
H12 - Ruislip, Northwood & Pinner and Harrow East constituencies
H13 - Ruislip, Northwood & Pinner constituency
H14 - Ruislip, Northwood & Pinner and Harrow East constituencies
H18/19 - Harrow East constituency
R1 - Orpington constituency
R2 - Orpington and Bromley & Biggin Hill constituencies
R3 - Orpington constituency
R4 - Orpington constituency
R5/10 - Orpington and Sevenoaks constituencies
R6 - Orpington constituency
R7 - Orpington and Bromley & Biggin Hill constituencies
R8 - Orpington and Bromley & Biggin Hill constituencies
R9 - Orpington constituency
R11 - Orpington and Old Bexley & Sidcup constituencies
S1 - Reigate constituency
SL2 - Chingford & Woodford Green constituency
SL3 - Bromley & Biggin Hill and Old Bexley & Sidcup constiuencies
SL5 - Bromley & Biggin Hill and Croydon South (towards Croydon) constiuencies
SL10 - Harrow East constituency
U1 - Ruislip, Northwood & Pinner constituency
U9 - Ruislip, Northwood & Pinner constituency
U10 - Ruislip, Northwood & Pinner constituency
W11 - Chingford & Woodford Green constituency
W13 - Chingford & Woodford Green constituency
W14 - Chingford & Woodford Green constituency
W16 - Chingford & Woodford Green constituency
I won't go into details about all the other routes as the scenario is somewhat predictable if you look at a map of London election results, but a few other notes:
61, 146, 193, 252, 256, 294, 346, 375, 379, 385, 397, 403, 404, 434, 496, 498, R1, R2, R3, R4, R5/10, R6, R7, R8, R9 and R11 are the only TfL routes to run entirely within Tory-held seats
33, 71, 209, 213, 406/418, 411, 467, K1, K2, K3, K4, R68, R70 and S3 are the only TfL routes to run entirely within LibDem-held seats.