"We are combining the senior management teams of Kensington and New Street to better leverage the capabilities of both of our lending brands."
In a statement, Northview Group, the parent company of Kensington and New Street Mortgages, said: "We are combining the senior management teams of Kensington and New Street to better leverage the capabilities of both of our lending brands.
"With this in mind, David Finlay and Adrian Whittaker have decided to leave The Northview Group to pursue new opportunities. We would like to thank them both for all of their hard work in establishing our lending platform and wish them every success in the future.
"Both Kensington and New Street will continue to operate as individual brands, delivering complementary propositions to the market. By combining our structure, we will be in a position to provide mortgage intermediaries with a more consistent experience across our lending brands and greater opportunity to place their cases, whether they need a light touch approach or more considered underwriting."
Alex Hammond, head of marketing and communications at Northview, is also leaving the Group to join Castle Trust.
David Finlay was previously managing director for intermediaries at Barclays, while Adrian Whittaker joined New Street from myhomemove where he was corporate sales director.
New Street launched into the buy-to-let market in February with initial distribution available to customers via London & Country, John Charcol and the LSL mortgage networks of Pink and First Complete.
It has since expanded its distribution to Intrinsic, Legal & General Nouveau and Mortgage Advice Bureau.