Signalling problems, specifically axle counters not working, somewhere
'in the Hackney area' i.e. between Dalston Kingsland and Stratford. The
whole thing ground to a halt with pax eventually booted off trains and
told to seek transport elsewhere (i.e. buses). I think the service
continued to run to the west, with trains reversing at Canonbury (?).

OK, stuff happens, but the recent big NLL infrastructure improvement
project should perhaps have made it not happen.