How do I do the British pound sign (?) with my keyboard?

I have a North American laptop keyboard.

You appear to have already solved that problem in your question.

it isnt already on they keyboard?

London Pound Symbol

ALT+156 :) PS. It only works on full keyboards, with the block of numbers on the right of the computer or laptop keyboard. if you don't have that then, i guess you'll just have to copy and paste Hope I helped :)