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
Two groups of men can be seen brandishing huge blades at each other during a late-night showdown on a deserted street.
These three wheelchair users have three separate stories about how London's bus network lets them down.
We want your pictures and video! The good, the bad and the ugly!