If someone is nice to you in the UK they want something, beware, if a British person is mean to you, you've got a friend for life
that's how it works
We are nice people, you just wouldn't guess it from our demeanor
When it comes to getting good service you're either too good for it or not good enough. Hold your nerve and pray they're not spitting in your food behind the counter
(I'm on about the type of service Britain is famous for)