Thanks for the reply Simon. The hole is in the leather edge panel on the seat squab. I had considered cutting a patch and glueing it in with another piece of leather as a backing.
I watched an episode of Car SOS where the leather grain was taken on a mould from another part of the seat and reproduced on the damaged part and the result was undetectable. Or, I have enough leather to do the entire car but that would mean discarding original leather that is not too bad.

Decisions, decisions!!
Brian

Location: Near M1 Jtn 28

Hardly surprising that we don't have a mouse problem with a ferocious feline prowling the premises, having dealt with the mice it's now moved onto to squirrels. You know she's earning her keep, she eats half and leaves half for me.

I suffered damage in the saloon until we bought a mains high frequency plug in mouse deterrent - works very well.

The mouse/mice did a good job, they chewed the seats on one side from bottom to top. It wasn't just a hole, was the full length. The upholsterer will re-do them and put more padding in as they get a bit uncomfortable after a while. I think the seats will sit in the house until we can sort the problem out.

Location: North Wales

Brian's solution is a valid one, when I was in business as an upholsterer we used to get tradesmen call in, who would to do small invisible repairs in vinyl upholstery that had been damaged. Not so successful on vinyl that was brittle and sun damaged as the repair itself was flexible. The quality of their work did vary but in general was surprisingly good.
They would create a rubber mold of the vinyl grain from the adjacent area, smear some goop over the problem (sometimes with added backing as per Brian's situation), cure the repair with a heat gun whilst applying the rubber mold sporadically. Finally they would colour match the original and spray paint over the repair. These mobile guys would do a round of the pubs, bus companies, car yards, upholsterers etc for budget seat repairs. As with everything there are some guys better than others, ask to see samples of his work, will work on leather.
I believe they do fabric as well by spraying a flock over the surface but I am sceptical about that result.
I would AVOID the DIY kits! regards Russell

Location: oz