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Derek is island hopping in this round-up of his favourite Welsh island walks.

He goes wild in west Wales as he sails to Skomer Island – a national nature reserve of international importance due to its seabirds - where he gets a close-up view of the puffins, razorbills and guillemots before staying up late to see the Manx shearwater.

Next, Derek goes to Flat Holm Island, where he braves a huge colony of seagulls and discovers more about the island's past, including some Victorian gun placements.

Lastly, Derek heads up north to Wales's largest island, Anglesey, where he visits another tiny island with a secluded chapel, an unexpected motor racing track, a neolithic burial chamber and takes a sauna on a beach.