Speaking at the release of the financial results on Aug 1, chief executive Todd Stitzer said: "Our candy share is expected to be adversely impacted by the floods in June which have disrupted production at our main UK candy facility in Sheffield.
"Manufacturing has now resumed on a limited number of lines and we expect production to increase over the coming weeks."
The company's underlying profits fell by 6 per cent to ú180 million for the six months to June 30.
In the UK, profits rose by 2 per cent, thanks mostly to the growth of its chewing gum brands Trident Splash and Trident Soft, which launched here in February.
Stitzer said: "Results are ahead of our expectations with our share holding comfortably over 10 per cent in a market which is nearly 20 per cent ahead since our launch."
A nut labelling recall in February and the company's decision "not to fully participate in aggressive discounting in the grocery trade" were blamed for a fall in the company's share of the confectionery market.