David Howdon" "davidhowdon[nospam] wrote:
There were delays on the Piccadilly line tonight but I found the
station announcement at Acton Town most odd. Here is what it said
(almost an exact quote)

"Due to a signal failure at Hangar Lane - Rayners Lane and Uxbridge
trains will be terminating at Northfields".

Can anybody explain how
a) a signal failure on the Central Line can cause delays on the
Piccadilly Line?

That's Hanger Lane Junction, where the Rayners Lane and Ealing Broadway
lines diverge. A failure by the person making the announcement to be clear.

b) How trains to Rayners Lane and Uxbridge which do not go through
Northfields can possibly terminate there?

Because they were diverted. Acton town is the junction where the Heathrow
line diverges from the Ealing/Rayners Lane line.