The deal comes with a rate of 1.88%, £199 reservation fee and £800 completion fee and is available at a maximum loan to value (LTV) of 80%.

Rachel Springall, finance expert at Moneyfacts.co.uk said: “At a time when mortgage rates grow increasingly competitive, it’s fantastic to see Newcastle Building Society offering a market-leading three-year fixed deal. At 1.88%, it becomes the lowest rate ever seen on Moneyfacts.co.uk records for borrowers with a 20% deposit over a three-year fixed term. “

Steve Carruthers, head of mortgage distribution at Newcastle Intermediaries (pictured), said: “This product offers a fantastic rate in the current market allowing both home-movers and remortgage customers the opportunity to fix their rate for three years.”