Fast-growing discounter B&M has announced a 12.9% increase in like-for-like third quarter sales across its 569 UK stores.

The group reported sales of £837.3m at its B&M stores in the 13 weeks ending 23 December 2017m and opened 19 new stores during the same period.

The Heron store estate, which B&M European Value Retail acquired in August, contributed sales of £79.8m. It opened four Heron stores during the quarter, taking the total estate to 263 stores.

Chief executive Simon Arora said: “B&M continues to go from strength to strength. Despite the demanding comparatives from the very strong Christmas in 2016, our buying, supply chain and retail teams achieved another outstanding performance this year by doing what we do best, which is delivering great value for customers week-in, week-out.

“With Heron also performing well and Jawoll having a solid quarter, I’m delighted with our progress and on behalf of the Board I would like to thank all of our colleagues for their hard work and commitment.”

The group also operates 84 Jawoll stores in Germany.