The Nottingham Building Society has reported gross mortgage lending of £651m in 2015, which resulted in a mortgage book growth of 3%.

Its pre-tax profit increased by 15% to £20m, with the Society welcoming 24,000 new customers and opening five new branches.

David Marlow, chief executive of The Nottingham, said: “I am delighted with the performance we have announced today, especially as our ‘all-under-one-roof’ proposition that clearly differentiates us from banks and other building societies, is received so positively by our customers.

“We are the only building society to offer our customers whole of market mortgage advice, acknowledging that in a complex world we can be more relevant to a much broader cross-section of customers. We find the right mortgage solution by searching over 50 different lenders; something we couldn’t always do when only offering our own mortgages. In 2015 we were delighted to provide advice to 80% more customers through this service than last year, with over half the customers being referred by our estate agency operation.

“We also offer a combined home buying, selling, renting and building society service in the majority of our locations; again significantly increasing our relevance to a much broader cross section of customers and we deliver this unique offering through top class customer service. At 74% our Net Promoter Score is among the highest in any sector in the UK, compared to an average for the financial services sector in the UK of 30% in 2015.”