Gibsons TFL London Underground Tube Map Jigsaw Puzzle, 1000 Pieces
London Underground Subway Map Jigsaw Puzzle 500 pieces | eBay
1000-piece London Underground Jigsaw Puzzle by Haynes UK - Etsy
Sarah 🍓 on Twitter: "Spent my weekend doing a 1000 piece puzzle of the map of the @TfL London Underground. Now there's nothing left to do but about 100 plain white pieces.