The cuts have been applied to a range of loan to values (LTVs) from 60 per cent to 96 per cent and are at up to 0.1 per cent.
It includes an intermediary only five-year fix purchase product at 75 per cent LTV with £999 fee which is now available at 2.04 per cent.
In addition to the reduction in interest rates, the lender has also doubled the cashback on one of its broker Help to Buy deals.
The five-year fix at up to 75 per cent LTV at 2.29 per cent will come with £500 cashback, up from £250.
Santander Mortgages head of mortgages Miguel Sard (pictured) said: “Spring is usually a busy time for the mortgage market and these new rates will help customers looking to purchase a new home in time for summer or wanting to spruce up their existing mortgage deal.”