The offset product will be marketed at Bank Base Rate +2.45% available with a £995 fee.
The lender is also launching a 5-year fixed rate deal at 3.99%, available with a £495 fee.
Miguel Sard, managing director at AFI, said: “We are committed to supporting intermediaries and their clients with great products and we are delighted to be launching two market leading intermediary exclusives our new offset for borrowers looking for the flexibility of an offset deal, and a five-year fix for borrowers looking for a great longer term rate.”
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