Giles, I think this is what you are looking for.
RENAPUR
LEATHER BALSAM
protects, waterproof and nourishes all leathers restoring their original softness and colour .
You apply it with a sponge ( supplied )
comes in a 250ml plastic tub as a hard wax ( colourless )
by Renapur ltd W.Sussex .UK .
ITS MADE FROM NATURAL INGREDIENTS INC BEESWAX .
I have been useing it for years , at first the seat's etc are sticky but this dry's off and a good buffing will make the leather shine . Its not cheap for the size but it last's a long while and you dont have to do them constantly , only used a 1/3 of this tub , its the sponges that you run out of so those green kitchen one's are just the job SOFT SIDE ONLY .
They do a cleaner as well
G