Before slipping into well-earned retirement, Sherlock Holmes has prevailed upon his long-time companion Dr Watson, his landlady Mrs Hudson and Inspector Lestrade of Scotland Yard to join him in a farewell tour of the British Isles. For the first time ever they will re-enact one of the detective’s most baffling unrecorded cases – The Case of the Prime Minister, the Floozie and the Lummock Rock Lighthouse – an affair upon whose outcome the security of Europe once hung by a thread. Shrouded in secrecy until now, this case has finally been approved by the government for public disclosure.