"TheOneKEA" wrote in message
...
Broken doors at Platform 1/3? IIRC the PSDs on the EJL regularly broke
when the EJL was first opened to full service (read this somewhere on
this newsgroup).


Sounds possible; though other possibilities include the presence of a
defective train in the eastbound platform, a driver-change problem (North
Greenwich is one the Jubilee Line's crew depots), or a signalling problem.

The same thing occasionally happens at Arnos Grove, and (even more
occasionally) Golders Green.