Glu-2-Go, which supplies gluten-free batters to foodservice outlets has seen big increases in sales since its launch in 2004. "There has been a change of attitude," said Glu-2-Go's Susan Ord. "When we first started, it wasn't a market. People didn't know what we were on about. But food intolerances are growing and things have changed."
President of the National Federation of Fish Friers, Bill Crook said: "I think gluten-free fish batter is growing substantially in popularity. Quite a number of shops are now doing it."
But, although the batter is easy to prepare, gluten-free fish and chips cannot be fried in the same oil as regular fish and chips for fear of cross-contamination, said Crook.
Last year Young's launched a gluten-free fish finger, which is on sale in Asda and Morrisons.
UK gluten- and wheat-free product sales rose by nearly 20% over the past year.