Originally Posted by AndrewP
Cut the lock when plenty of people are looking and see if anybody cares that a bike is being stolen.
Although that would be an interesting social experiment, the location of the bike - between the MI6 building on the Albert Embankment and a second office block which is filled with police officers - would suggest that I probably ought to let someone know what I'm up to before I start attacking the lock with a pair of bolt clippers!
Thanks for all the suggestions, folks. Bolt clippers or the Dremel sound favourite at the moment - not least because the cable isn't long enough for me to get it on the ground.
Matt