HP Sauce, the original brown sauce which since 1899 has set the standard for quality. Everyone's favourite, this legendary and uniquely distinctive sauce is the result of our dedication to sourcing the highest quality ingredients and using a closely guarded secret recipe. The Original & The Best. HP BROWN SAUCE. Allergy Information Contains: Barley, Gluten, Rye Other Information Additives: Free From Artificial Colours Additives: Free From Artificial Flavours Additives: Free From Artificial Preservatives Recycling Info: Recyclable Pack Recycling Info: Not Recyclable Cap/Lid Additives Other Text: No artificial colours Additives Other Text: No artificial flavours Additives Other Text: No artificial preservatives