It looks like the set of Game of Thrones. Wolin in Poland hosts one of the world’s largest gatherings of Viking enthusiasts each year.

Hundreds come to recreate Viking culture - and take part in fierce, competitive battles. Many are drawn by a passion for history. But, for a significant number, it’s a way of escaping their past - a past scarred by violence.

The Viking scene attracts people who are combat veterans, former football hooligans, and others struggling to come to terms with violence.

It also seems to appeal to men who have lost direction in their lives, and are looking for a sense of purpose.

Four members of the international group called the Jomsborg Vikings, which is about 2,000 strong, explain what draws them to the Viking world, and how it has changed their lives.