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

This Businesswoman’s Lawsuit Could Make Brexit Even More Complex

Claire Zillman
By
Claire Zillman
Claire Zillman
Editor, Leadership
Down Arrow Button Icon
Claire Zillman
By
Claire Zillman
Claire Zillman
Editor, Leadership
Down Arrow Button Icon
October 13, 2016, 10:07 AM ET
SCM Private LLP Founding Partner Gina Miller Interview
Photograph by Bloomberg Bloomberg via Getty Images

Britain is already steeped in a state of deep uncertainty about how exactly it will handle its exit from the European Union—and a ‘Brexit’-related lawsuit being heard Thursday, whose lead claimant is investment manager Gina Miller, threatens to make things even more complex.

At issue in the case is Article 50 of the EU’s treaty, which allows member states to leave the union (click here for the full text). The article’s murky language, which says a state’s exit from the EU must be done “in accordance with its own constitutional requirements,” has left its interpretation up for debate. After all, the U.K. doesn’t have a written Constitution.

The U.K. government, now led by Prime Minister Theresa May, maintains that the nation-wide balloting on June 23, which resulted in a vote to leave the EU, and its own executive powers are enough for it to notify Brussels without parliament’s consent.

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

But Miller, co-founder of investment boutique SCM Private, is one of at least seven individuals who filed private actions challenging that stance.

Their argument, which goes before the High Court on Thursday, is that the executive can’t actually take the country out of the EU—only an Act of Parliament can do that. The referendum itself was, legally speaking, merely consultative, rather than legally binding.

Miller told BBC Radio 4’s Today show that she’s not attempting to overturn the referendum’s outcome, stating, “We are all leavers now.” Instead, she’s interested in obtaining an answer to “a fundamental legal question about the powers that can be used by the prime minister and whether they can side-step parliament.”

That hasn’t stopped demonstrators from protesting outside the law firm representing her. They’ve appeared near the offices of Mishcon de Reya—the law firm representing Miller et al.—with signs saying, “Invoke Article 50 now” and “Uphold the Brexit vote,” according to The Guardian. Those leading the legal challenge have received much more serious backlash too, 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.

It’s perhaps a good thing then, that Miller is used to being disliked.

Miller launched SCM 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. And she’s gained a reputation as an advocate against hidden fund charges and has decried what she characterizes as flagrant mis-selling of funds. 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 added. “I believe that level of abuse means I am doing something right for investors.”

Whether Miller gets that same kind of redemption in the Brexit case is a matter for the courts to decide. The plaintiffs start making their case Thursday. The government’s response is expected Monday and arguments may carry over to Tuesday. The judgment may not be handed down immediately, but whoever ends up losing is expected to appeal to the Supreme Court.

Because there is such a short time before March, which is the deadline May has set herself for invoking Article 50, the case will skip to the top of the court’s docket. An ultimate judgment against the government could force it to draft legislation to invoke Article 50, which would give members of parliament opposed to Brexit the chance to vote against it. A clear majority of MPs across all parties voted to remain in the EU, according to anecdotal reports, while the official results show that over 60% of electoral districts voted to Leave. A vote on Article 50 would thus force many MPs to go against the wishes of their voters.

 

About the Author
Claire Zillman
By Claire ZillmanEditor, Leadership
LinkedIn iconTwitter icon

Claire Zillman is a senior editor at Fortune, overseeing leadership stories. 

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

takaichi
Arts & EntertainmentJapan
Japan’s Prime Minister welcomes Deep Purple, capping 50-year love affair with heavy metal: ‘You’re my god’
By Mari Yamaguchi and The Associated PressApril 10, 2026
1 day ago
Eva Longoria secretly worked as a headhunter from her soap opera dressing room for three years—because she refused to be a ‘struggling actor’
SuccessThe Promotion Playbook
Eva Longoria secretly worked as a headhunter from her soap opera dressing room for three years—because she refused to be a ‘struggling actor’
By Orianna Rosa RoyleApril 10, 2026
2 days ago
Fortune 500 Power Moves: Which executives are gaining and losing power
C-SuiteFortune 500 Power Moves
Fortune 500 Power Moves: Which executives are gaining and losing power
By Fortune EditorsApril 3, 2026
8 days ago
The short, uneasy tenure of Pam Bondi
NewslettersMPW Daily
The short, uneasy tenure of Pam Bondi
By Emma HinchliffeApril 3, 2026
8 days ago
Olympic champion Eileen Gu’s advice for women seeking her heights of career success: Don’t be a small fish in a big pond, ‘Create your own pond’
MPWMost Powerful Women
Olympic champion Eileen Gu’s advice for women seeking her heights of career success: Don’t be a small fish in a big pond, ‘Create your own pond’
By Emma HinchliffeMarch 31, 2026
11 days ago
Can Sheryl Sandberg’s Lean In take on tradwives and the manosphere?
NewslettersMPW Daily
Can Sheryl Sandberg’s Lean In take on tradwives and the manosphere?
By Emma HinchliffeMarch 27, 2026
15 days ago

Most Popular

Scottie Scheffler joined Tiger Woods and Rory McIlroy in golf's $100M club—and donated his entire Ryder Cup stipend to charity
Success
Scottie Scheffler joined Tiger Woods and Rory McIlroy in golf's $100M club—and donated his entire Ryder Cup stipend to charity
By Fortune EditorsApril 10, 2026
1 day ago
The Navy confirmed an ‘abundant amount’ of Uncrustables when the Artemis II crew lands. Smucker’s just offered them a lifetime supply
Politics
The Navy confirmed an ‘abundant amount’ of Uncrustables when the Artemis II crew lands. Smucker’s just offered them a lifetime supply
By Fortune EditorsApril 10, 2026
22 hours ago
The 'affordability economy' has created a housing market nobody predicted: Prices collapsing in the Sun Belt, soaring in the Rust Belt
Real Estate
The 'affordability economy' has created a housing market nobody predicted: Prices collapsing in the Sun Belt, soaring in the Rust Belt
By Fortune EditorsApril 11, 2026
12 hours ago
Mark Cuban admits he made a mistake letting go of the Mavericks: 'I don't regret selling. I regret who I sold to'
Investing
Mark Cuban admits he made a mistake letting go of the Mavericks: 'I don't regret selling. I regret who I sold to'
By Fortune EditorsApril 9, 2026
2 days ago
Schools across America are quietly admitting that screens in classrooms made students worse off and are reversing years of tech-first policies
Innovation
Schools across America are quietly admitting that screens in classrooms made students worse off and are reversing years of tech-first policies
By Fortune EditorsApril 10, 2026
1 day ago
Warren Buffett says 'accumulating great amounts of money' doesn’t achieve greatness—He still lives in a $31,500 Nebraska home and clipped coupons
Success
Warren Buffett says 'accumulating great amounts of money' doesn’t achieve greatness—He still lives in a $31,500 Nebraska home and clipped coupons
By Fortune EditorsApril 11, 2026
9 hours 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.