I'm thinking here of egg/gluten/dairy allergy sufferers.
We mainly shop at Tesco, Sainsburys and Holland & Barrett. My MIL got some unusual products from Asda, but DS rejected them all (jam tarts & apple pies).
Are the chocolate cake bars the same from everywhere - the only difference between Asda/Sainsburys & Tesco seems to be price.
Is there anywhere good online, or does delivery costs rule that out?