Guizers gathering for Up Helly Aa

The main set of guizers at the Up Helly Aa festival are known as the Jarl Squad

Hundreds of flaming torches are thrown onto the galley at the culmination of the night

The squad lead the processions through Lerwick and the festivities afterwards

The Viking guizers are made up from locals of all ages, dressed in helmets, sheepskins and carrying axes

Up Helly Aa is descended from the ancient festival of Yule, which the Vikings held to celebrate the rebirth of the sun

The Norsemen set light to their longship after it has been dragged through Lerwick

There will still be plenty for the Jarl Squad to do as the island parties into the night