On 4 July, 09:45, John B wrote:
On Jul 4, 9:31*am, D7666 wrote:

On Jul 4, 9:15*am, MIG wrote:

But weren't there a lot of new build 317s that went straight to Kings
Cross as well? *The ones with the opening windows and smoother cabs

Also correct, but that 2nd batch of 317s was never related to Snow
Hill / TL and again can't be counted as part of that fleet.

I assume they were 317s for no more reason than that was the current
type in production - this is the same reason NSC got extra 6 x 319s as
Cig/Vep accident replacements - they were the only third rail DC
capable type in current production.

When did SNC/Connex's allocation change from 6x319 to 20x319?

The 319/1s came along later and must have changed everything.