Were you in restaurants or pubs, the "bar" would imply pub. Pubs tend to be multi-purpose, and just like you're not waited on for drinks you're not waited on for food either. The general gist is unless there's a dude at the door to count your party and escort you to a table you won't get waited on. Just go to the bar/food area/whatever n order there.(You might get waited on after that though. Just doing it pro-actively in a place like a pub to go to each table without food n ask if they want some is a waste of time)
With practice you learn to not end up with more than £5 of change in your pocket. Anything bigger should be notes.
I'm pretty sure I mentioned that you won't get much England in London. Too expensive to live there. Most people you'll meet, without going into an office or something, will be tourists like yourself. If you want proper England n English people you need to head out of London.
Your TV sucks. We have classic stuff, so do you guys. The "90% of everything is shit" rule still applies. Also I have no idea who Kardashian is. btw a bunch of our channels (depends what you had; Freeview, Sky, Virgin?) are from US. Discovery, CNN, MTV, History Channel, SyFy, whatever.
I have unsmoked bacon and swap between back bacon n streaky bacon.(depends what's cheap )
Don't forget we use real sugar. Size is mostly likely a cultural thing (big is better) as well as it making more sense to sell at 500ml that 591ml.
Sweetcorn? I'd always been under the impression you guys called it Maize (or at least native americans). Also the many pages of this 35 page long thread should have taught you that UK, as the creator of Imperial measurements and participant of EU, uses both Imperial and Metric. You may be going a bit far with quarts though.