Sorry, I said BACS out of habit - I meant a bank transfer of any sort. No problem about the 10k limit as the transfer will be done in person at a bank rather than online (it is my Dad after all, he doesn't have a clue about technology).
BACS isn't an internet banking thing - even if he goes into his branch to send the money you might still get hit for fees?

I'm doing my tax return in the next few weeks so I'll ask my accountant while I'm there.