O.K., so now the end of the cable has broken off. It's the end nearest the pedal. Prior to this, the cable came off, and I put it back on again. Our old friend Murhwiz suggested sticking it on with gaffa tape ( I bet he's a Kia Dealership mechanic
) but alas, it is now broken. The dealer said they can do it on Wednesday which means I lose almost £400 in lost lesson fees, so I'm getting the cable in the morning and doing it myself (hopefully) or a mechanic who lives a couple of doors along. The saga continues.