To be honest as I said earlier, do not worry yourself too much about the intricacies of it, that's only for the upper classes.
Just don't be offended if there is food left on th plate, we are used to smaller portions here.
When they arrive, they are more likely to just want to sleep if they can as it's a long journey and jet-lag.
Oh, don't say fanny around them at all, even fanny-pack. Over here fanny is a term for female genetals and not a term used for describing the backside. Loo/bog/carzey is toilet if they ask, we don't call it a bathroom.
(A Scot who adds the milk last, now that's a first for me, all the ones I have met it's milk, tea bag then hot water.)