We walked the streets and ended up in Vauxhall, south London, seeking out something unusual in the crowds. Mr Lucky decided to leave an invite in the appropriately named ‘Lucky Fish Bar.’ He explained the concept vaguely to the owner, Linda, and asked if she would hold an invite whilst he posted a clue on his Twitter feed. Her excitement at the prospect was so endearing that Mr Lucky could not resist. "This one is for you, Lucky Linda," he said handing her an envelope.