Paul_D said:L'Occitane is lovely but pricey.
I'm using "Bulldog original natural grooming" at the moment. It was pretty cheap at sainsburys. No parabens, artificial colours or fragrances. It contains rosehip oil and seems OK.
http://www.theenglishshavingcompany.com/cgi-bin/psProdDet.cgi/81M530%7C%7C@cTravel%20shaving%20brushes@b%7C0%7Cuser%7C%7C10%7C