Hello to my UK Friends
I returned from the UK after a month long trip all of it in England the southern parts Cotswold to Ipswich. The UK celiac society puts out a book every year listing the gluten free food brands that are safe and it updates it on their website. They also have an email address where your can ask them questions. I think they also have a phone number.
Their website will also lead you to local groups. They will give you any information on meetings or other activities and they sometimes have recommendations from people in the area about eating establishments.
I found them quite useful. There was a great tearoom in Morton in Marsh that served gluten-free food. I stayed mostly in places where I did my own cooking or just had the vegetables at restaurants or pubs.
I must say you folks are a lot further ahead in Celiac awareness than we are in the US. I ran into many people who were Celiacs or knew of one. Most restaurants were very aware of food issues.