Now, what to look for.....

By Law all allergens should be listed in the ingredients list.  An allergy advice box is not always available and therefore the safest thing to do is to read the list of ingredients.  Wheat, Barley, and Rye are very often listed in bold at the top of the list, but not always so you need to be vigilant.  As always, if you are not sure, ask.
Most Coeliacs are registered with Coeliac UK the National Charity for the condition and this gives us access to a food and drink directory, which means if you don't know, we can check.

WHAT IS NOT SAFE

Wheat
Wheat Starch
Wheat flour
Barley
Barley Malt*
Barley Malt Extract
Rye
Rye Flour
Rye Starch.
Oat Flour
Gluten
Wheat Gluten
Barley Gluten
Durum Wheat
Cous Cous
Bulgar wheat
Pearl Barley
Semolina
Spelt
Modified wheat starch
rusk
wheat bran
wheat flour
wheat protein
wheat rusk
wheat starch



WHAT IS SAFE
Buckwheat
CODEX wheat starch *
Cornflour
Corn Starch
Rice Flour
Rice Starch
Rice Bran
Rice Malt
Rice rusk
Potato flour
potato starch
polenta
Modified Starch
Modified Maize Starch
Mustard Flour
Mustard seeds
Gram flour
Hops
Quinoa
Teff

*Barley Malt Vinegar is safe for the majority of Coeliacs, best to check first if they have sensitivity to it
*CODEX wheat starch is specially treated wheat starch which again makes it safe for the majority of Coeliacs again best to ask as some are sensitive to it.

If you're catering for a Coeliac who has a problem with wheat then avoid the Codex Wheat Starch.

All Vinegars are Gluten Free.

All Beers, Lagers, Ales and Stouts are not Gluten Free, but Wines and Spirits are incl. Malt Whiskey.