I have now started to recondition the leather on the wheel. It's a multi step process so I will post pictures at each stage.
The following pictures are after a thorough clean with white spirit and single coat of leather colour.
The leather looks a little lighter than in the other pictures but trust me it's the same. In fact I have only put the leather re-colour on the affected areas and the main leather had not been touched.
I was quite suprised how much a single coat has done.