Strangely enough I have just ordered some leather treatment over Ebay. I originally heard about it in The Times car supplement - they said it was used by Maranello, Aston etc. etc. and actually makes the leather smell 'leathery' again! Haven't tried it yet, but it smells the part. It's called Glipton 'Liquid Leather', incidentally, and mine was bought from user: performancemotorcare.com who were spot in with delivery and have 100% feedback. Will let you know how I get on with the stuff on Sunday!
S.