26 heartstopping photos from London's urban explorers

You might have been to the top of the Shard, gone for dinner at Duck & Waffle or booked yourself into the Sky Garden – but have you ever hung off the edge of a skyscraper? These fearless few sneak to heights few of us would dare approach without a well-constructed safety rail, but luckily for us they've documented their adventures and shared their amazing photography with us.