There wasn't a signal failure last night there was a water splash, I had
4 signals to trip past and was expecting my pic to be taken!

Adrian wrote:
Helen Deborah Vecht gurgled happily, sounding
much like they were saying:

I receive TfL email travel alerts which included this gem today:

CIRCLE LINE: Severe delays are occurring due to the late finish of
engineering work at Finchley Road.

????

That was down for the Met line earlier, too.

random speculation
SWMBO thought there'd been a signal failure at Finchley Rd - which is
probably what they were fixing - and it's entirely possible that that
caused a knock-on down to the signals at the Circle/Met split at Baker
St...

Either that, or a Circle Line driver's got lost.