Thorntons said the hot summer had hit full-year sales but it plans to increase its market share of confectionery sales held by supermarkets.

Turnover for the year to June 28 rose 2% to £167.1m from £163.8m last year. Pre-tax profit fell almost 10% to £6.4m from £7.1m.

Chief executive Peter Burdon said: "The reality we face is that the market share of confectionery sales held by supermarkets is now just over 50% and this will continue to grow."

He said that multiple retailers hold the key to "an even broader base of potential customers".

Burdon added that the improvement supermarkets had made in the range and quality of their offers has seen many "impulse driven categories" such as confectionery being purchased during the weekly grocery shop.