MIG wrote:
[re 442s transferring to Southern]

I would assume that they would only indirectly replace 319s and
actually replace 377s on Brighton Express.

But are full length Mark 3s cleared for that line anyway?

Certainly from Clapham to Brighton, from XC days. I'm not sure about
Clapham to Victoria - have a vague idea Victoria itself isn't cleared
for 23m stock, but might have got that wrong.

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