Which? executive director Richard Lloyd said: "While the situation is improving, it is still unacceptable that one in five chickens we tested were found to be contaminated with campylobacter.
"We want to see the risk of contamination minimised at every stage of production, because for far too long consumers have been expected to clean up mistakes made earlier in the supply chain."
More top news
Any UK roll-out of of exercise referral schemes ‘needs to be rethought to maximise their effectiveness’, they warn.
The Duke and Duchess of Cambridge attended the annual charity event at the London Palladium.
The Scottish Conservatives have withdrawn support for Aberdeen North candidate Ryan Houghton.