The team – led by Christine Close, a sculptor based in France – carved a kraken eating a boat as part of the myths and legends theme set by the competition organisers.
They worked with a large block of snow, starting with a small model.
“We used big chisels on the end of broom handles. A bit like gardening hoes. You use those to stab at it and shave stuff way,” explained Roche.
“And we used a length of chain that had nuts and bolts set in it with two handles at the end like a big chain saw to carve off the really big bits that we needed to get rid of at the start of the design.”