Its products will be available to 1000 mortgage advisers through the network, which is part of the Sesame Bankhall Group, which represents 25% of all UK intermediated mortgage lending.
Bank of Ireland re-entered the UK intermediary mortgage in December 2014.
Alison Pallett, director of sales UK mortgages at Bank of Ireland UK, said “This partnership adds another top performing network of mortgage advisers offering our products to their customers.
“Working with the very best brokers has always been our key goal, and it is a source of great pride that we can name Sesame as one of our trusted partners across the UK.
“This stands as a testament to the hard work and dedication of people we have put in place to ensure we best serve the brokers we work alongside.”
Bank of Ireland has recruited experienced members of staff and launched a multi-million pound investment in an online application system since re-entering the market.
John Cupis, managing director, mortgages, at Sesame Bankhall Group, said: “We are very pleased to form this partnership, as our goal is always to be able to offer our customers the very best financial products available across the market.
“Together with Bank of Ireland for Intermediaries we are well-placed to meet this requirement, and our intention is to build on this collaboration over the coming years.”