I suppose that once the new timetable is in place and there's no chance of a 313 standing in for a service, first class can safely be 'added' to the services that are currently standard only.
I have to say I hadn't really thought of that before.
Also, I believe that from next week a lot more services will be officially announced as calling at London Bridge than have been previously.
Unless anyone's actually seen anything to the contrary, I can't see any reason to take away first on that service.
I've had a look through the 365 workings from May. It appears to go like this:
In the morning, 7 pairs and 1 triple, the triple doing the 07:05 Peterborough-KX. It seems the remaining triples ex Peterborough in the morning peak are 387s, so this isn't going to please the Peterborough route commuters if they want maximum seats. Indeed some morning peak shoulder workings from Peterborough remain 2x365. Needless to say all units stable in Hornsey after the morning peak.
Things are more complicated in the evening, as the units appear to come out of Hornsey as 4 pairs and 3 triples. The pairs all do Baldock/Royston services, with one pair finishing with 19:36 KX-Peterborough. One triple divides at Peterborough, with one unit running back to KX singly on 19:42 Peterborough-KX. Another triple runs back to KX on 18:32 Peterborough-KX and then divides, two units making 20:06 KX-Peterborough, and the third unit laying over at KX and joining up with the single unit off 19:42 Peterborough-KX to form a double for 21:06 KX-Peterborough. The third triple simply stables after finishing at Peterborough. So more 12 cars to Peterborough in the evening, but still not persisting long into the evening - although to be fair the demand may not be there.
The three after-PM-peak 2x365 workings to Baldock or Letchworth don't appear to clash with the proposed second Cambridge-Brighton Thameslink service, so I can't see any operational reason for these services to cease in December. It's a pity they aren't running all day!
There appear to be 3x return trips from Peterborough to London on Saturdays which are presumably 2x365 each. All these are fast from/to Biggleswade.
Also, if we thought 4-cars had finished on GN, think again -- there seems to be 4-car working on Sundays, although it's not clear whether this is 387s (probably) or there may be a small amount of 365 work.
On a different note, I notice a few class 700 services have been cancelled this week. 2122 KX-Peterborough cancelled both Wednesday and Thursday evenings, and 0604 KX-Cambridge cancelled this morning. The first two were reportedly down to lack of driver, and the latter due to a defect with the train.