Paul Merton and Suki Webster explore Snowdonia and pitch up at Lake Bala, where they meet a couple who have converted an old horsebox into a family-sized motorhome. Paul and Sue sample some of the many watersports available, starting with paddle boarding and ending with a little synchronised swimming. The following day they're off to the Mach Loop valley - a famous flight path for the RAF fighter pilot training at nearby Anglesey