In this month's Good Housekeeping magazine page 153 there is an offer from Molton Brown. Spend over £20 and get £10 off with code HOUSE10. It says it can only be used once per person and not in the outlets, department stores or travel retail stores.
BUT I have just tried to use it and it says there is an 'internal error'. Will try again later.
Offer valid until 5th November.