Hi Alasdair,
Your instrument cluster motherboard has a fault, as this clearly isn't normal. Sometimes this fault is caused simply by a failed LED, and sometimes there's a less obvious cause. One way or another, I can repair it, and it's not an expensive job.
If you have the necessary tools, knowledge and confidence to remove and refit the instrument cluster, then the repair can be done by post. Of course, whilst the cluster is 'on holiday' at mine, you won't be able to use your car. As such, I always aim to do the repair is promptly as possible, to minimise downtime.
If you're willing to bring the car to me, then I'll do the repair whilst we have a chat. I'm an hour's drive south of Gretna. I've driven through Cupar countless times because I studied at St Andrews, so know that it's about 3.5hrs away.
Kind regards,
Tom