Hi there, loads of people on here feed Royal Canin, you can get that in Pets at Home, Arcana is also popular theybare a berns food who also make Orijen both have grain free you can order online.
UK & Ireland Distributors of ORIJEN, ACANA, ZiwiPeak and Purr & Simple | Bern Pet Foods
I have been feeding , James Wellbeloved but have ordered other brands to try him on, he likes Eukanuba but it doesn't seem to be popular here and I have just started a little bit of Orijen mixed in but he seems to hate that. Alfie has major allergies so I will be trying royal Canin next and if that doesn't work out Canine Caviar online order only in UK I think.