I think a couple of items are a bit suspect. The London Underground is referred to as 'The Tube' or the London Underground, generally not 'London Tube' if you talk about the Tube in the UK, it's implicit that's it the London one. Not convinced ginger powder is obvious, would normally be referred to as ground ginger wouldn't it?
Also not much cross-over between groups so more a case of working out what the groups are rather than which ones are in which group.