Chocolate maker Thorntons said interim sales rose 4.4% and that it will continue to ramp up its market share of confectionery sales at supermarkets over the next two years.

Turnover for the 28 weeks to January 10 increased to £109.3m from £104.7m last year. Pre-tax profit rose 11% to £12.1m from £10.9m in 2003.

Chief executive Peter Burdon said sales of retailer own label branded products increased 6% to £8.8m and that its partnership with Marks and Spencer “continues to flourish”.

Thorntons noted that commercial sales now account for 20% of its volume, with branded product sales outside its own estate up 140% to £3.6m from £1.5m last year.

For the seven weeks to December 27, Christmas like-for-like sales were up 4.6%.