Irwin Mitchell has added private wealth specialist Berkeley Law to its growing list of subsidiary businesses as the firm looks to take advantage of the Mayfair-based boutique's roster of high-net-worth clients.

Berkeley, which was set up in 2010, is the sixth business Irwin Mitchell has acquired since gaining an Alternative Business Structure (ABS) licence two years ago. The previous acquisition was a tie up with FTSE 250 insurer esure in August.

The latest deal will see Irwin Mitchell add two further London offices to its existing City network as it takes over Berkeley's Mayfair and Kensington locations.

Berkeley Law and its separate residential property and conveyancing business, Berkeley Hurrell, will retain their names and will continue trading from the offices as ABSs, but will be part of parent company Irwin Mitchell Holdings.

Berkeley directors Nick Rucker, Alex Ruffel and Tim Thornton Jones are set to become partners in Irwin Mitchell as part of the acquisition.

Irwin Mitchell chief executive Andrew Tucker (pictured) said: "This is an important strategic acquisition for us and one which will enable us to broaden the range of services our experts on complex financial matters can currently offer, while enabling Berkeley Law to offer its clients access to a wider range of quality services through both our personal and business legal services divisions."