TSB and Paragon are the latest lenders to cut rates, while Accord has tightened affordability for some borrowers.
TSB will be introducing discounts on a number of housing deals tomorrow.
The lender reduces the three-year fixed interest rate for home purchases by up to 20 basis points.
The two-year fixes for remortgages at a loan-to-value ratio of 75% will fall by up to 10 basis points.
The two-year fixes for the purchase of houses will also be reduced by 5 basis points.
In the buy-to-let sector, Paragon has reduced rates by up to 20 basis points and further streamlined its pre-application process.
Other lenders cutting rates this week include Santander by up to 27 basis points, plus Halifax and BM Solutions, but Natwest has announced some increases.
Meanwhile, Accord has tightened affordability requirements for some borrowers.
It has increased the minimum income threshold for retail customers borrowing at a multiple of 4.49x loan to income value (LTI) and above from £50,000 to £65,000.
The change does not apply to starters who do not have a minimum income requirement.