On Mar 18, 5:27*pm, "Paul Rigg" wrote:

How on earth can GPS be used at St Pancras LL or for that matter City
Thameslink.

You need to have a clear view of the sky - I would also have though
Farringdon (or any other station with a roof) would have been difficult.,

Quite. This is why SN 377s still take a silly amount of time to open
the doors in the low-level platforms at Victoria (and why they took a /
really/ silly amount of time before whatever solution they currently
follow was added).

--
John Band
john at johnband dot org
www.johnband.org