To move away from the esoteric discussions of the Cannonbury curve ...

Is there now a case for reinstaing the Great Northern service to
Moorgate at evenings/weekends? Highbury is a far easier connection to
the tube than Kings Cross, and with connections now to SE London as
well it is surely would be useful to many more people.

Most of the stations along the line are already staffed during tube
hours, so I can't see that there would be a great deal of cost. Essex
Road may have to remain closed. As for Drayton Park, its not
underground and FCC don't seem to be adverse to serving unstaffed
stations eleswhere. There may have to be special arrangements when
Arsenal are playing at home.

I am not an expert in these matters- there may be issues I haven't
thought about. But as a customer I know which I'd prefer.

peter