Had a recommendation but I don't think they are in the UK. I switched my whole gang this year and am extremely pleased with the results. I feed a balancer from Progressive Nutrition that is less than 6% starch, no corn or cereal grains. Basically all of the good stuff without the junk and filler. I'd bet there is something similar on the market there.
Life is like a camera. Focus on what's important, Capture the good times, Develop from the negatives and if things don't work out, Take another shot.