Our thanks to Xana Askew of Cassidy and Ashton Architects in Preston, who sent us these photos of urban mountaineers tackling the north face of the building next door. “I took these from my third-floor office fire escape door. Some people have no concept of vertigo … or health and safety,” she says.

Email your “favourite” health and safety pictures to building@ubm.com or upload them to the Building Network at network.building.co.uk. The sender of every picture published in the magazine receives a £25 Marks & Spencer voucher. Please make the pictures as big as possible.

For more blunders and the latest health and safety news, go to www.building.co.uk/healthandsafety