I don't know if I have a Mac or a PC
, and I don't seem to have the keys anybody's mentioned. I'm sorry, thanks anyway
.
No worries! We're here to help!

I'm betting you have a PC.
In which case the "alt" key is on the bottom row, left side, below the "shift" key (maybe 2 keys over?).
Hold down the "alt" key, then press "0163" -- on my work computer (a tower), you need to use the number keypad, not the top row of numbers (not sure how it works on a lap top, sorry! I don't have a PC to test.

)
If it's a Mac, there will be a small apple icon at the far left side on the top-most menu bar.
If you do have a mac, the "option" key is also on the bottom row. Hold down the "option" key and hit the number "3" = £
If I didn't explain it clearly enough, please let us know . . . that's what this thread is all about, asking stupid questions and getting answers without feeling foolish.
(There's no such thing as a stupid question!

)
Alt+0163