On Jun 6, 3:48*pm, MIG wrote:

On 6 June, 15:23, Mizter T wrote:

[snip]

(I suppose Chiltern could possibly run a Harrow-on-the-Hill to
Marylebone shuttle if a few non-striking LU signallers could be found
- though are there any crossovers south of HotH?)

There aren't.

I'd like to say 'well in that case they can run two trains in steam'
on each line, but I'm sure there'd be problems with trying to treat
two non-reversible lines as reversible!