Rates start at 3.49% for a mortgage at 70% loan-to-value (LTV).

In addition, it has launched a mini multi-unit block (MUB) product, designed for blocks of two units. The product is available at 3.74% over a five-year term, at a maximum LTV of 75% and with a minimum loan size of £150,000.

Both the special edition and mini MUB products are available for purchase or remortgage, individual or limited company borrowers.

A 1.5% completion fee and £150 application fee applies.

The lender also revealed that introducer partners will have access to a new five-year fixed large loan product, for borrowers looking for between £500,000 and £750,000 of funding. It comes with an initial interest rate of 3.48% at 65% LTV, and enjoys a reduced completion fee of 0.5%.

Steve Griffiths, sales director at The Mortgage Lender, noted this was the first time the lender had launched a special buy-to-let tranche, and said he was delighted to have been able to do so “with a top quartile rate”.

He continued: “All of the changes to our products provide competitive criteria and rates for niche segments of the buy-to-let market and have been developed alongside our broker partners who have told us what they and landlords want.”