Domino's Pizza Group said today that it expected to open more stores this year than previously thought as it posted a rise in underlying sales in the UK.

Britain's biggest pizza delivery firm said it would raises its UK store opening expectation to 80 from 70 in 2016.

Domino's said like-for-like sales for the third quarter from June 27 to September 25 in its core UK business was up 3.9%. 

The company, which also operates in Ireland and Switzerland, posted a 7.6% growth in underlying sales in Ireland and a 16.7% jump in total Swiss sales.

It said it continued to be encouraged by the third quarter results in Ireland where the strong sales growth was benefiting from the increasing trend towards digital ordering and the growing economy.

Meanwhile, Iceland and Norway continue to perform strongly with system sales growth of 17.5% and 124.8% respectively. 

The company said that its expansion continues with one store opened in Iceland and three new units in Norway in the year. It also expects to open its first Swedish store before the end of the year.

The group said a surge in online orders boosted its third quarter sales. Sales through digital channels were up 18.1% with over 80% of its delivered sales orders now coming through online platforms.