Customers can redeem up to 10% of the capital each year, without penalty.
Kim Rebecchi, Leeds sales and marketing director, said: "The Society has reduced rates by up to 0.31% and now has a market leading 3-year mortgage from 2.94%.
“This provides a fantastic opportunity for those borrowers who wish to take away any uncertainty, on what is usually a household's biggest monthly outgoing, and lock into low fixed repayments.
“It provides customers with peace of mind and the security that their monthly payments will remain the same for three years at a very affordable rate.
"Furthermore, the mortgage is also fully portable, so should customers wish to move home, they can take this market leading product with them without penalty."
The Society has also reduced the rates on the fees assisted versions by 0.31% and 0.10% up to 75% and 85% LTV respectively.
There are now fees assisted versions of these 3 year products, with free valuations and legal services for standard re-mortgages, at 3.44% up to 75% LTV and at 4.29% between 76% and 85% LTV.
