There is one more thing:
My driver's seat had three scratches in the right hand bolster, from rivets on jeans. I did one myself

but the other two were already there.
I bought a repair kit from here......
http://www.furnitureclinic.co.uk/Leather_Touch_Up_Kit.htmThey advertise in Practical Classics.
Obviously black is easy, but they also supply colour match kits. It took just a few minutes to sand the leather with 1200 grit, and apply the magic coloured solution. You finish the job off with a clear liquid finisher which is provided high gloss and matt, so you blend to get a match, and it's amazingly good.
Unfortunately the camera won't show it well enough, so you'll just have to take my word for this one.
PS: For some reason I can't right click & paste on this post??????