Base jumper parachutes off The Shard four times Mr Witchalls, 46, from Great Canfield, said: "When I heard it was being built, I thought, 'I must give that a go'." On his fourth jump Mr Witchalls climbed the tower dressed in construction worker's clothing and a hardhat. For the first 50 floors it's stairs, then they get more steep, then near the top it's ladders. Every time you turn a corner there could be a security man there," he told the Sun newspaper. To get to the top involves hours of wandering around, watching for cameras, holes in fences, ways in. I spent a lot of time sussing it out. I stood outside making a plan," he said. He added his daredevil antics demonstrated the potential dangers posed to Londoners by the apparently lax security. I could have been a terrorist. I could have planted a huge bomb. Imagine a bomb the size of my backpack, full of explosives. A thousand feet up it would do some damage," he said. Watch Dan Witchalls leap from The Shard. Video: www.thesun.co.uk