Victor Mishcon handled the divorce of
Ruth Ellis and later attempted to secure a reprieve for her after she was convicted to death for murder in 1955. In 2006, Mishcon de Reya represented
Karie Murphy in a legal dispute with her trade union
Unison, which brought
financial mismanagement charges against her. It also handled her communications with the press during the
2013 Labour Party Falkirk candidate selection affair, allegedly as part of
legal aid offered to Murphy by
Unite the Union. The company ran a VIP Russia service that provides "
reputation protection,"
wealth structuring and
asset protection for Russian clients. The
Pandora Papers revealed that the company had helped Russian politician
Alexei Chepa use an
offshore company to buy a London mansion in 2011. Mishcon de Reya's employment team won a case in the
UK Supreme Court on behalf of its client Krista Bates van Winkelhof, in which it was determined that members of
limited liability partnerships (LLPs) do have the protection of
whistleblowing legislation. In 2016, the Supreme Court ruled financial claims can be brought over 20 years after divorce for client Kathleen Wyatt. In 2016, the company co-ordinated
a challenge in the High Court by
Gina Miller, an investment manager and philanthropist, against the process of the
United Kingdom's withdrawal from the European Union. The British government appealed the High Court ruling to the Supreme Court in January 2017, but were unsuccessful. In a majority decision, it ruled that Parliament must vote on whether the Government could start the process of the United Kingdom's withdrawal from the European Union. The firm again represented Gina Miller in 2019 in
R (on behalf of Miller) v The Prime Minister. The Supreme Court unanimously ruled that Prime Minister
Boris Johnson's decision to prorogue Parliament was unlawful. In July 2018, the
Labour Party MP
Margaret Hodge briefly used the services of Mishcon de Reya to threaten a lawsuit against
Jeremy Corbyn's Labour if it pursued disciplinary action against her for verbally attacking Corbyn in the
House of Commons over
Labour's revision of the IHRA definition of antisemitism. In 2019, the Court of Appeal overturned the judgment of Mr
Justice Warby dated 8 October 2018 which had refused Mishcon de Reya's client, Richard Lloyd, ex-director of
Which?, permission to serve a representative action on
Google LLC. The claim relates to what is known as the "Safari Workaround" – Google's alleged unlawful and clandestine
tracking of iPhone users in 2011 and 2012 without their consent through the use of
third party cookies. In 2020, the firm acted on behalf of 397
Hiscox Action Group members, in a £52 million claim against Hiscox Insurance for refusing to pay out on
business interruption claims due to
COVID-19. The Supreme Court handed down its judgment in favour of the policyholders. In January 2025, Mishcon de Reya, through its partner Adam Rose, in collaboration with barrister
Adam Wagner of
Doughty Street Chambers, provided
pro bono legal representation for British nationals and individuals with strong UK ties who had been
held hostage in Gaza. Among those represented was
Emily Damari, a British‑Israeli national, who was one of the first three hostages released under a
ceasefire agreement after approximately 15 months of captivity. As of February 2026, they were working as lawyers for
Peter Mandelson, defending him against "baseless accusations" that he was going to flee the country following the release of the
Epstein Files and the investigation into his conduct. ==Controversies==