South East firm DMH Stallard is to merge with 18-partner London-based KSB Law in what is DMH's second merger in as many years.
The combination will give 48-partner DMH, which has offices in London, Brighton and Gatwick, its first base in the northern Home Counties, as well as additional lawyers in the capital.
KSB practises commercial, real estate and private client law, complementing DMH's strengths in those areas.
DMH managing partner Tim Aspinall said: "Like all firms, we talk to other firms, but we never comment on any discussions we're having at any time until we're in a position to confirm something concrete."
DMH Stallard was itself formed in January 2005 through a merger between South East law firm DMH and 15-partner London outfit Stallard.
Aspinall has ambitious growth plans for the firm, which include more than doubling turnover from £20.1m at the end of the 2005-06 financial year to £50m within five years.
KSB managing partner Christopher Boyce was unavailable for comment.