"Luap" wrote

This trackwork has been in place on both sides for a few weeks. I
presume it won't be connected until much closer to the start of
services to Peterborough and Cambridge (King's Lynn?), which have for
a long time been planned for something like 2018, when London Bridge
(with the new Borough viaduct) and the Bermondsey and St John's dive-
under and fly-over work are all completed.

AIUI the new Thameslink stock is going to be maintained at a new depot at
Hornsey - so the connection will be needed as soon as the new stock starts
arriving. Not yet, but well before 2018.

Peter