The interesting thing to consider is how the MHE branch can be made more
useful in the long term. One idea I put on my website is to have it as a
branch of Crossrail Line 2, and extend it to Watford Junction via MHB,
Edgware and Stanmore. This would mean that nobody in North London would
have to detour to Euston to catch a train to The North, and more
passengers would be attracted to the outer ends of lines, where there's
plenty of spare capacity. Does anyone else have any other ideas for it?

I'm sure I remember reading at some point a vague plan to run the East
London Line from Highbury & Islington to Finsbury Park, then take over
the old Parkland Walk to Stroud Green, Crouch End, Highgate, East
Finchley, Finchley Central and Mill Hill East. This was ages ago,
though, and I can't remember where I read it.

Patrick