Thank you I will definitely give these places a go. This is my first holiday abroad since being diagnosed with coeliacs so a bit nervous about it.

Mercadona has a good rep as a 'sin gluten' supermarket. The Owner's Son is gluten sensitive, and he has made a point of selling as many 'sin gluten' products as he can find to stock their shelves with
Also Route 66 restaurant in Cap salou will do their level best to provide sin gluten meals; you only have to ask Ellie or Sue, and they will help.