LATEST: The art installation takes 4 hours so the climbers have decided it's not safe to install before it gets dark. #iceclimb
We're still far from certain whether they can make it to the top but they're going to try. #iceclimb
Important to remember this is the first ascent of the Shard. Nobody has ever done this before. There are lots of unknowns. #iceclimb
More top news
London Underground claims unions refused to discuss a revised pay offer.
Lutfur Rahman was also ordered to disclose detail of income and expenditure.
10 years on, George Psaradakis has given his first interview, recalling the events of July 7 2005.