How would you clean leather?

Use ordinary toilet soap - the stuff you wash your face with - and a

*damp* - not wet - cloth, rinsing it frequently. For stubborn stains use a nail brush. Avoid getting it any more wet than necessary. When dry, use some hide food. Then polish with a clean cloth.

Saddle soap (which, unsurprisingly, you can buy from equestrian supplies shops) is excellent. Nowadays it's available as a solution as well to save the elbow grease. Those kinds of shops will also have leather balm to nourish dry leather.

One quick Google search and here's a UK mail order supplier:

I'm not sure, I'll ask my wife when she comes in.

swash

Definitely agree with Steve there ...........saddle soap is the best

Is it also good for the seats and the rest of the interior leather?

Try

The stuff is probably available at your local ice rink.

Ken

I swear by this combo for taking care of the leather in my car: