Good luck to you with pursuing this.
We have visited the Royal Yacht Britannia in Leith. After seeing it moored so often on the Prince of Wales pier we thought that the royal connections would be the highlight, but apart from Charles and Diana's honeymoon bed (
) it was getting to see around the inner workings of the ship from the bridge to the engine room and learning how it was operated that we came away most impressed by, so this could be a winner.