HP sauce is probably the best known brand of brown sauce in the UK. Indeed I read recently that at one stage it cornered over 70% of the retail brown sauce market.  It is used as a condiment with hot or cold savoury food and when I was growing up, it was always splattered liberally over Irish stew.  So if you pop into most British kitchens you will find a bottle somewhere, but one man has found a new – and criminal- use for the sauce.