Group revenues have increased by 25.8 per cent to £930.3m, with 47 net new stores opened in the UK in the period, on track for 80 net new openings this financial year.
UK like-for-like revenues were +1.2 per cent.
Group adjusted profit before tax increased by 25.4 per cent to £66.4m.
There are now more than 80 garden centres incorporated in stores in the group. Garden buyer is Nigel Press.
Two new additional distribution centres opened in the UK by the end of September 2015 totalling 800,000 sq ft.
Chairman Sir Terry Leahy said: "B&M has made good progress in the first half of the financial year towards its strategic goals of reaching at least 850 UK stores and creating a platform for longer term growth in Germany, whilst delivering further pleasing growth in sales, profits and cash generation. We are well prepared for the rest of the year and beyond."
Chief executive Simon Arora said: "Our unique retail model continues to deliver strong revenue growth as we extend our geographic footprint. In the UK, our teams have opened 47 new stores in just 26 weeks – a record rate of openings for B&M.
"The business is growing at an annualised rate of over £400m per year, which brings its own operational challenges. However, the investment made in our supply chain infrastructure and in other core functions will support the next stage of our expansion. Our colleagues have worked incredibly hard over the period and I am very proud of their continued achievements."