wrote:

Sorry about the late comment, but I kept forgetting to check
the details out. Apparently it appears to have been
re-commissioned of sorts by Tubelines and was used by engineering
trains during the recent Barnet branch shut down. I'm not sure
when it will be recommissioned for use by passenger trains though.

What sort of work would be needed for the frame to be used by passenger
trains? Would the layout need to be modified?

http://www.trainweb.org/tubeprune/Totteridge-ltt5-2.gif refers.