The product is available up to 60% LTV with £250 cashback and comes with a free standard valuation.
The lender has cut other 60% LTV mortgages by up to 0.4%. Three and five-year fixed rates now start from 2.19% and 2.59% (reduced from 2.59% and 2.94% respectively).
For borrowers with smaller deposits, Platform has introduced two, three and five-year fixed rates at 90%, starting from 3.49%, 4.14% and 4.39% (reduced from 3.79%, 4.54% and 4.74% respectively).
Co-operative Bank's head of mortgages Stuart Beattie said:
"These latest mortgage rate changes reflect our continued commitment to providing quality products to both brokers and their clients. The breadth of choice available ensures Platform can meet borrowers’ mortgage needs.”