Both loans are available to homebuyers and remortgagors.
The offset is available up to a maximum loan size of £1m and the fixed rate at up to £550,000.
Miguel Sard, managing director at Abbey for Intermediaries, 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 flexi 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.”