The most dangerous building sites in the world as spotted by eagle-eyed Building readers.

Health and safety blunder in Dubai
"This is approximately 20 storeys up! Either they ran out of kick boards and hand rails or they have found a way of getting over the impending pension finance problem!" says Marc Draper, director at Building Services (Dubai).

health and safety blunder in Newfoundland
"Just sit back and relax..." - Cliff Wren, development director at Stent snapped this at St John's in Newfoundland. Look carefully and you'll see the blue rope holding up the right-hand end of the ladder.

construction worker asleep on the job
"At least he is wearing his yellow jacket and a hard hat, and has fenced himself off from the traffic," points out Barry Rose, partner at Fanshawe, who took this photo on Holborn Viaduct, just outside the Old Bailey in London.

Health and safety blunder in Belgium
"This'll be sturdy enough..." Tom Butler from CB Richard Ellis, who took this shot in Ghent, Belgium, isn't so sure.

Welsh health and safety blunder
As Tony Wehby, project manager at Anglo Holt Construction says: "Maybe the sea air in Wales makes these roofers.