My heart pounds and my shoulders tense as my fingers hover over identikit pieces of steel grey cloud. “Surely this one…, no this one, aargh it must be this one,” I think, frantically trying to slot them together.

For many people, jigsaws are a relaxing low-energy pastime, but at the World Jigsaw Championships competitors are speed building for trophies.

How quickly do you think you could piece together a jigsaw puzzle? Well these people having been putting their skills to the test in Spain.

The winner, a 30-year-old woman from Norway, took just 37 minutes to complete a tricky puzzle featuring tigers.

The four-day event in Valladolid in Spain gathers 3,500 of the best puzzlers, working individually or in teams, for the chance to be crowned champion.