Many thanks to Tim Harris for this picture of precarious perching in Bristol – even if it does slightly contravene rule two of his own safety blunder code.

Email your “favourite” health and safety pictures to building@ubm.com. The sender of every picture published in the magazine receives a £25 drinks voucher. No cash alternative will be offered. The editor’s decision on which pictures to publish is final. Please make the pictures as big as possible …

To view our gallery of your health and safety blunder photographs, log on to www.building.co.uk/safetyblunders