"1506" wrote

That would be great. Better yet extend the ELL to Queens Park, or
Watford. That would mean dual electrification thru Primrose Hill.

AIUI there was dual electrification between Primrose Hill and Camden Road
from the time the short-lived Maiden Lane freightliner depot was opened
until quite recently - but has the third rail now been removed, as the NLL
is now OHLE only from Stratford to Acton. ELL units which use the connection
west of Highbury & Islington will have to change to 25 kV OHLE.

There were a while ago suggestions of restoring a Camden Road - Primrose
Hill - Queens Park service, though in the unlikely event of this coming
about it seems more likely to be operated by trains from Stratford rather
than the ELL.

Peter