I think you are in need of my book, The Septic’s Companion (it’s also on the web at septicscompanion.com). It’s a brief guide to all things British, split into some wordy sections and a dictionary of British slang. It’s terribly funny, although I’d be inclined to think that given that I wrote it. I hunted around the place to find an address to send you a copy but couldn’t work it out – drop me a line if you’d like one!