Ben Tidswell was admitted as a barrister and solicitor in New Zealand in 1988 and joined City firm Ashurst in 1993, becoming admitted to the roll of solicitors in England & Wales in 1994 and a solicitor advocate in 1999. A partner in the London Disputes practice at Ashurst since 2000, he has worked on a wide range of commercial litigation and regulatory matters, including several cases before the Tribunal over a period of almost 20 years. He was the Global Chairman of Ashurst from 2013 to 2021. As of 2021, he was appointed as a Chairmen of the Competition Appeal Tribunal.