• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia
MPWMost Powerful Women

This Investment Manager’s Lawsuit Has Thrown a Giant Wrench in Theresa May’s Brexit Plan

By
Laura Cohn
Laura Cohn
Down Arrow Button Icon
By
Laura Cohn
Laura Cohn
Down Arrow Button Icon
November 3, 2016, 12:57 PM ET
High Court Judges Decide That The Prime Minister Can't Trigger Brexit Without MP's Approval
Anadolu Agency Getty Images

It’s a good thing investment manager Gina Miller has repeatedly demonstrated that she has a thick skin because she’s going to need it. A judgment in her case against the U.K. government delivered a devastating blow to Prime Minister Theresa May as she attempts to execute the Brexit vote, and it added more unease to an already-fraught post-referendum atmosphere.

Miller, the lead claimant in a Brexit lawsuit, proved victorious when Britain’s High Court ruled in her favor on how the country must proceed with its bid to leave the diplomatic bloc. The ruling said parliament must vote to trigger Article 50 of the EU’s treaty, which allows member states to leave the union. The government had argued that the nationwide balloting on June 23, which resulted in a vote to leave the EU, and its own executive power were enough for it to notify Brussels without parliament’s consent. It is appealing the court’s decision.

The ruling was a major strike against May since she has laid out a Brexit timetable that doesn’t necessarily allow for a parliamentary vote. She had said that Brexit talks would start before the end of March. While analysis of the ruling says that timing is now up in the air, a spokeswoman for May disagreed, telling reporters, “Our plan remains to invoke Article 50 by the end of March, we believe the legal timetable should allow for that.” Britain’s Supreme Court is expected to hear the appeal in early December.

Subscribe to The World’s Most Powerful Women, Fortune’s daily must-read for global businesswomen.

The ruling infused even more derision into an already-tense climate. The divisive June vote split the country by many dimensions—young versus old, rich versus poor, urban versus rural—and exposed waves of anti-immigrant sentiment.

Some Twitter users saluted Miller for her “bravery” in bringing the case, while others made racist comments about Miller—she was born in Guyana—and accused her of treason.

After the decision was announced, Miller spoke to reporters outside the Royal Courts of Justice, and said her lawsuit was about Britain as a whole, not her personally. “This case was about process not politics,” said Miller, co-founder of investment boutique SCM Private who opposed Brexit. “My dedicated team are absolutely delighted to be able to be part of this debate and to bring some sobriety as we go forward.”

In the run-up to Thursday’s ruling, Miller explained her reasons for challenging the government, telling Business Insider UK in August that people in Britain “must not underestimate or forget the anger in Europe about our vote.” She added that the U.K. “has always had a special relationship with the EU. They’ve given to us significantly over the years and we’ve always had a veto.”

But Miller’s remarks have done little to stave off backlash. In October, near the offices of Mishcon de Reya—the law firm representing Miller, et al.—protesters appeared with signs saying, “Invoke Article 50 now” and “Uphold the Brexit vote.” Those leading the legal challenge have received much more serious criticism, including death threats and online abuse. At one preliminary hearing for the case, a judge ordered the identities of some plaintiffs withheld for their own protection.

This isn’t the first time Miller has been in the middle of a controversy. She’s gained a reputation as an advocate against hidden fund charges and has decried what she characterizes as flagrant mis-selling of funds. Miller launched investment boutique SCM Private with her husband in 2009 after the financial crisis showed her how opaque the asset management industry was. Her firm is built on low-cost passive investment strategies, but also actively manages how the assets are allocated.

She’s pushed asset managers to disclose exactly how much they charge investors. That activism, she told the Financial Times in April, has sapped her popularity in the profession. At one industry party, three attendees called her a disgrace. “One of them replied…that my lobbying efforts would bring down the entire City [of London],” she said, referring to London’s financial district. “I believe that level of abuse means I am doing something right for investors.”

She took that same approach in facing flack for the Brexit case. Boycotts of her business and Facebook campaigns “encouraging people to do things to me,” haven’t deterred her, she said. “That fuels me more. We cannot let bullies hijack this process. It certainly isn’t a comfortable place to be.”

About the Author
By Laura Cohn
See full bioRight Arrow Button Icon

Latest in MPW

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • Future 50
  • World’s Most Admired Companies
  • See All Rankings
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • About Us
  • Editorial Calendar
  • Press Center
  • Work At Fortune
  • Diversity And Inclusion
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in MPW

MPWMost Powerful Women
Influencer Alix Earle turned her worst insecurity into her first brand. This is her plan to monetize her 14 million followers and make it last
By Emma HinchliffeMarch 26, 2026
7 hours ago
MagazineCentene
The youngest-ever female CEO of a Fortune 500 company is fighting Trump’s cuts to keep Medicaid strong
By Diane BradyMarch 24, 2026
3 days ago
AsiaPepsiCo
Three Asias, three different playbooks: How PepsiCo’s Anne Tse views the world’s fastest-growing snack market
By Nicholas GordonMarch 20, 2026
6 days ago
NewslettersMPW Daily
Inside one CEO’s battle to get a tariff refund: ‘We did take a beat to consider the best path’
By Claire ZillmanMarch 18, 2026
8 days ago
NewslettersMPW Daily
Hinge is growing while online dating competitors are struggling. Its new CEO explains why
By Ellie AustinMarch 17, 2026
9 days ago
NewslettersMPW Daily
The most powerful moments for women at the 2026 Oscars
By Ellie AustinMarch 16, 2026
10 days ago

Most Popular

C-Suite
'I didn’t want anybody shooting me': Five Guys CEO gave away $1.5 million bonus to employees over botched BOGO burger birthday celebration
By Fortune EditorsMarch 25, 2026
1 day ago
Success
Palantir’s billionaire CEO says only two kinds of people will succeed in the AI era: trade workers — ‘or you’re neurodivergent’
By Fortune EditorsMarch 24, 2026
2 days ago
Environment
Vail Resorts CEO says it’s time to think beyond the $1,000 ski pass that helped build the empire
By Fortune EditorsMarch 26, 2026
14 hours ago
Success
JPMorgan’s Jamie Dimon says remote work breeds ‘rope-a-dope politics’ and stunts young workers’ growth
By Fortune EditorsMarch 25, 2026
1 day ago
Commentary
The Treasury just declared the U.S. insolvent. The media missed it
By Fortune EditorsMarch 23, 2026
3 days ago
Magazine
The youngest-ever female CEO of a Fortune 500 company is fighting Trump's cuts to keep Medicaid strong
By Fortune EditorsMarch 24, 2026
3 days ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.