TSB Intermediary saw 18,000 new customers and 8,000 brokers in its first year.
The lender said 2015 had been a busy year, with the launch of 140 products and taking 1,600 calls in its first month, and 8,200 calls by November.
According to the company, its new mortgage enquiry line answered calls in 2.4 seconds and the average application-to-offer time is 12.9 days.
The company also said that just 15 per cent of cases are referred to an underwriter and calls to relationship managers were returned within three hours and any email enquiries received before 5pm were responded to the same day.
There is no dual pricing, with mortgages available through TSB Intermediary the same as those offered in branch.
Roland McCormack, mortgage intermediary director at TSB, said: “We’ve had an incredible year and I couldn’t be happier with what we’ve achieved in just 12 months.
“TSB was born to bring competition to the market and we’re already proving to be a significant player in the intermediary space.
“I made a promise when we launched that we wouldn’t ever sacrifice our service standards for volume, and we have stuck to our guns on that by working extremely hard to provide a stand-out service to brokers.
“I firmly believe that you can copy systems and products but you can’t replicate people and the service they deliver.”
James Carter, principal at Independent James in London, said: “It sounds pretty good. I have just registered with them. You can’t argue with the numbers.”
