"Roland Perry" wrote in message
...

My point is that I'd expect all the legacy stock (on Cambridge-London) to
be going. Some may remain on Moorgate-Letchworth.

What they said:

5.13.6 Following the completion of the Thameslink
Programme the following morning peak train service
(14 trains per hour) is anticipated as remaining in
operation into London King's Cross:

Cambridge stopping services, via WGC
- two x eight-car trains operated by Class 377
stock (maximum acceleration is particularly
important on this service group, given the
need for calls at Welwyn North)

Peterborough fast services
- two x 12-car trains operated by Class 365
stock

[The other 10 services are 2 x Kings Lynn IEP and 8 x long distance.]

I'm surprised by that mention of 377s though, didn't see that coming...

Paul S