Adam and Jonny arrive at Mum and Dad's house with big news to announce - they both have girlfriends. Dad buys a caravan that has seen better days and is keen for the family to have dinner in there. However, Mum refuses to step foot inside, though Jim is less fussy as his house has flooded. Simon Bird, Tom Rosenthal, Tamsin Greig and Paul Ritter star in Robert Popper's award-winning comedy.