I didn't want to get into this. I have a strange feeling that a British cup is different to an American cup.

Our pint is 20 fluid ounces and a American pint is 16.
I have some American measuring cups (AA, I think) - I'll have to go and measure them. i suspect that they are 8 fluid ounces and ours are meant to be 10 fluid ounces but don't quote me.

I've never quite worked out how to measure butter in a cup - do you have to melt it first, or just squidge it in???