As if John Boyle’s attempt to cruise the whole west coast of the British mainland in a Sealine 34 wasn’t ambitious enough, he’s opted for a tricky detour.

On the second leg of his Irish Sea adventure, John cruises up the west coast of Wales past St David’s Head and Bardsey Island.

Having coped with a swift current off the coast of Ramsey Sound, spotting a few basking seals along the way, our intrepid skipper is up for a challenge.

He decides to eschew the direct route to Holyhead in favour of a cruise through the treacherous Menai Strait, which he describes as the closest thing to white-water rafting that you can do in a motorboat.

Contradictory advice on whether to avoid or follow the breakers leaves John scratching his head. Will ‘Shark Bay’ come through unscathed? Will he make it to Holyhead in time for a well-earned pint?

Watch the video above to find out:

Click here for Part Three