Depending on where people live, many GPs are now no longer prescribing gluten free bread, biscuits, crackers etc anymore because of the huge prices that the gluten free food manufacturers are charging the NHS. It is a bit alarming and for the food producers to stay in business they are now going to need to reduce their prices or rely on coeliacs buying the food directly from them which some people will do but many will now just use the internet to search how to make gluten free bread and other stuff themselves....
An Asian food supermarket is a coeliacs best friend. Many of the gluten free flours can be bought at fairly low prices. Sainsburys also sell Xanthum Gum and gluten free cereals (the cereals are expensive though so my partner only eats them when they are going on a special offer). He now has a porridge made up using some Sainsburys gluten free porridge with some rice flakes bought from Asian supermarket.