Rob Bell returns with a two-part series on Great British ships. He starts at the top with the (now decommissioned) Royal Yacht Britannia, a floating palace with an ‘if these walls could talk’ story to tell.

Rob explores the ship’s 44-year history, taking in life both above and below deck to discover how royal protocol was observed at sea – and whether it was ever broken.

Did Britannia, in fact, waive the rules?