Concerns that the hot summer might have slowed the growth of Domino’s Pizza proved unfounded as the company boasted of an exceptionally strong third quarter.Like for like (LFL) sales in its 501 established outlets rose by 10.8% in the 13 weeks to 27 September, compared to an 8.8% increase in the corresponding period of last year.LFL sales in the first 39 weeks of the year were up 8.3% versus 10.5% last year.System sales over the 13 week period jumped 17.8% to £98.2m, compared to £83.3m in 2008, bringing total system sales for the first three quarters to £294.5m, up from £253.5m a year earlier.Customers are using the firm’s online ordering service more frequently. E-commerce sales for the third quarter rose by 43.1%, while over the first 39 weeks of the year e-commerce sales were up by 39.9% to £52.7m. Online orders in the UK now account for 27.2% of delivered orders, up from 22.6% at the same stage of 2008.‘As a result of strong trading in the third quarter, the board believes it is on track to exceed market expectations for the full year,’ said Chris Moore, chief executive of Domino’s Pizza.