other very British phrases and their meanings:
"would you like more ice cream?" means "I'd like more ice cream, but I'm asking you first, not only hoping that you will say yes, but that you will offer it back to me and than I can legitimately say yes to an kind offer - this way I can avoid the humiliation that would follow my otherwise shameful behaviour of just grabbing the box and fill my bowl with a second helping thus appearing greedy, rude and oh so unpolite"
"how are you" means " hi, this is awkward, go away immediately and please do not tell me how you are because not only I'm not interested, nor will I indeed remember the answer, but I most certainly don't have time for rude people who complain when one only says hello to be polite!"
"you should come over sometime for a cup of tea and a chat" means "I like you but I will never have or make the time to actually invite you in my house, but of course I expect you to immediately offer the same thing and if you don't invite me over I'll have a good reason to strike you from my Christmas card list!"
do I pass?