C&C Group, the Irish company behind Magners cider, has warned full-year revenue and profit margin will be lower than expected because of a weak performance from Magners in Great Britain.

Overall revenue for the year to 29 February 2008 was expected to fall by 10% and operating profit margin by around 10 percentage points, the company said in a trading update.

Revenue for the quarter to 30 November 2007 fell 15% compared with the same period last year because of an 18% decline in the group's cider division, led by a 30% fall in Great Britain.

Trading over the Christmas period in Great Britain had been “weak”, C&C Group said.

“The performance in Great Britain primarily reflects the impact of a loss of on-trade market share during the period to 31 August, the negative carry-over impact of poor summer weather on recruitment to the premium cider category and a very weak overall on-trade market,” C&C Group added.