Get thee to Asda
Seriously, they sell fresh gluten free bread, and it's good
If your local store doesn't carry it they will get it in for you too.
That apart, it's been a looonng couple of years for me sorting out new recipes for food I can eat.
Firstly, does your Mum eat meat and is she fine with dairy ?
If so, coeliac is easily dealt with.
Dove's farm sell flour that just replaces the wheat stuff, and it works too.
Sausages and the like made with rusk, can't be replaced easily but there are companies that sell gluten free foods like that and deliver to the front door.
http://www.goodnessdirect.co.uk/cgi-local/frameset/sect/I-Special_Diets.html
for instance.
Happy to share recipes, but tell me what kind of food is she missing and that might be a good starting point.
I found that in the West we concentrate on the four gluten rich grains, wheat, barley, oats and rye, but there are literally hundreds we can eat instead without any problems with gluten. From Sorghum to Amaranth, Rice, Corn, Quinoa, Lentil, Bean.....the list just goes on and on.
If I can help, let me know ?
cheers,
Mary