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.

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 Spanish city of Valladolid has hosted one of the most quirky events around the world recently, a massive jigsaw puzzle competition with participants from all over the planet.

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

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

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.