What I’ve done wrong is I sent an incortect fee of £17 instead of £43. So they sent me a cheque for £43 (I haven’t cashed it in) and then invoiced me for the same amount. Ok, sent them £43, then they requested the paper bit of my licence back. Luckily I didn’t loose it so could sent it back to them.
I’m more than ready to go for the theory test…