Shares in Cadbury Schweppes fell 6p to close on 540p yesterday after the group announced that its UK sales had fallen.

The confectionery giant, which was hit by a salmonella scare in June, said that said that since the beginning of July, year-on-year sales in the UK were 5% lower than expected.

Julian Hardwick, an analyst at ABN Amro, said: “People are grappling with the question whether it is salmonella or part of a secular trend. If we get back to normal weather and we don't see a pick-up in demand, then we will know.”