Under the terms of the agreement, advisers of IN Partnership will have access to L&G’s exclusive products, providers and club services.
IN Partnership had around 450 IFAs and mortgage advisers who completed over £1.8bn of lending in 2011.
Ben Thompson, managing director of L&G mortgage club, said: “IN Partnership is precisely the type and quality of business that we want to be striking closer links with.
“It is clear that lenders are increasingly going to look at the quality of mortgage distribution and will reward those that can demonstrate high standards as well as of course scale.
“The link with IN Partnership will help us to build further volume and quality to the club, as well as provide us the opportunity to work with their management to look at ways to unlock new financial planning opportunities for their members and IN Partnership.”
Kevin McDonagh, chief executive of IN Partnership, added: “Our new relationship with L&G Mortgage Club brings more choice, value and convenience to our members and also widens and strengthens the strategic engagement we already have with L&G across other product lines.
“We are delighted with this new announcement which complements our business focus on growth, profitability and our investment strategy, together with our RDR and MMR ready technology project and programme of transitional and client proposition workshops for members.”