In the latest instalment from our footage of Britain and Ireland's incredible coastline, John and Fionn refuel their Sealine S34 before setting off from Brighton Marina in the hope of rounding the southeast corner of England

In the latest video from The Great Motorboat Tour series, John and Fionn leave Brighton Marina and make their bid to round the southeast corner of England all the way to Harwich, via Beachy Head, Eastbourne Pier, Dover and the Thames Estuary, which John approaches with some trepidation.

Click here to see all the other videos in the series so far.