That's the ones! Right, I have a bit of key shifting in front of me, but you've cracked it! Thanks SO much!

Now, the big question is: why is none of this detailed in the manual, and why have OFA customer services still not got back to me? Anyway, you've answered the question brilliantly.

EDIT: Scrap that last bit - they got back to me and want me to send in the original remote and they'll make a new code for it!