Can be turned by leaving Birmingham New Street the wrong direction or around Edinburgh.

Did Airdrie-Bathgate electrification include the curve from Slateford round to Haymarket West? If so then there would be an electrified triangle here too.
Could always do Euston - Wembley Yard - (then along the City line) - Gospel Oak - Kensington Olympia - (then via the line Southern trains use) - Wembley Yard - Euston? [/speculation]
Not cleared. And no wires to Kenny O!
I believe they use the triangle from Finsbury Park to the North London Line to turn 225s.
Manchester airport branch line, could be long enough for the job?
I believe they use the triangle from Finsbury Park to the North London Line to turn 225s.
Or the Bowes Park sidings, which, to bring it back almost on topic, is where they turned the Pendolino when the tested it on the ECML: http://www.youtube.com/watch?v=FEixQYjsSjQ
How do you reverse a train Bowes park? There is no triangle or loop at Bowes park or bounds green is there?
With enough time and a fork-lift truck.
Or the Bowes Park sidings, which, to bring it back almost on topic, is where they turned the Pendolino when the tested it on the ECML: http://www.youtube.com/watch?v=FEixQYjsSjQ
there are some fanciful suggestion on here :roll:
I think it likely ( without checking) the stock was turned in Birmingham because of disruption.