Don't forget the Sherlock Holmes tour at the Sherlock Holmes museum. Located at 221B Baker Street, and oddly enough 221B is located on Baker Street between 237 and 241.
Baker Street wasn't long enough for a 221 when the stories were written.
England's food is varied and mysterious. Obviously have a bloody good curry (recommend a Biryani, Balti and maybe a Chicken Tikka Massala (the last two are British inventions)) and as many meat pies as possible. Get fish and chips but have Haddock, not Cod. Try and encourage a native to cook you a Sunday roast. Get a high-end Ploughman's Lunch in a decent-looking pub. It's not what Ploughmen used to eat but worth it. Try Cheshire cheese and blue stilton. Obviously at least one full English with black pudding (and not baked beans!). Others will have to advise you on incoholic beverages

Remember in England a f-a-g (language filter, lolz) is a cigarette and a fanny is not a bottom. Saved you some trouble there.
Definately make the trip to the RAF museum in Hendon - you can spend a day there easily and it's free to get in. Some unique examples of aircraft still there. Beautiful silver Spit9 hanging on the wall the minute you walk in. Let's you know what you're in for.
Too bad I can't meet you my friend. I'm also on the continent now. Enjoy yourself.