British law firms Irwin Mitchell (IM) and Thomas Eggar have completed their merger to create a £250m legal services business with nearly 300 partners across 15 locations.

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The merger is expected to transform the structure of Irwin Mitchell’s business and will see turnover in the combined business team increase to more than £80m.

Irwin Mitchell’s legal services to businesses and high-net-worth private client work will account for half the new group’s turnover, while the personal injury business will account for the remainder.

As part of the merger, which was initially announced in November 2015, all Full equity members and fixed share members of Thomas Eggar will join IM on the same status.

Also, IM has been completing a Tupe consultation for the transfer of Thomas Eggar’s staff to Irwin Mitchell.

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Irwin Mitchell Group CEO Andrew Tucker said that the firm is looking to further strengthen its business legal services, private client and personal injury divisions.

"Our combined business legal services and high net-worth private client divisions now account for about 50% of our business and will become ever more important. The merger also significantly strengthens our presence in London and the south and means that for the first time more than half our turnover will come from the southern half of the UK.

"We plan significant investment in our business, private client and complex personal injury practices, and mergers and acquisitions are a key part of our strategy to give us the scale and breadth of service that clients demand."

Thomas Eggar managing partner Vicky Brackett said: "This merger is a catalyst for change and combining the strengths of both our firms will create a business that is among the best in the industry."