Bertie finds himself desperate to go to the loo on the school coach, up to his neck in sand (and trouble) on holiday, and staging a one-man protest to stop Mum and Dad from selling the house! Dirty Bertie - the boy with nose pickingly disgusting habits - is back for another helping of comic chaos! Bertie finds himself desperate to go to the loo on the school coach, up to his neck in sand (and trouble) on holiday, and staging a one-man protest to stop Mum and Dad from selling the house!