Here’s a question most shoppers never ask: who actually made the T-shirt in your bag? Under UK rules today, a big company mostly has to publish a statement about that. Soon, it may have to prove it checked.
On November 4, the UK government said it will bring in a mandatory human rights due diligence law. In plain words, large companies will have to look for forced labour and other abuse in their supply chains. Then they’ll have to do something about it. That’s a big jump from “tell us what you’re doing” to “show us you did it”. So let’s unpack what changed, who it hits, and why investors should pay attention too.
So what actually changed?
The news came in a written statement from Jonathan Reynolds, the UK’s Business and Trade Secretary. It follows a government review of “responsible business conduct”. That’s a fancy way of saying how companies treat people along their supply chains.
That review didn’t hold back. It found the current system “fragmented and overly reliant on voluntary action and reporting measures.” It also said the UK had fallen “out-of-step with G7 partners and other major trading economies.”
So the government wants three things. First, a legal duty for big firms to find, assess and respond to the risk of human rights abuse and labour exploitation. Next, a regulator that can investigate goods that may involve forced labour and order them off the market in Great Britain. Finally, a single guidance hub on GOV.UK with tools and templates.
Reynolds said the package will “safeguard the competitiveness of responsible businesses” and help keep goods linked to forced labour away from UK consumers. Honestly, that first bit is the clever part. It frames the rules as protection for the good guys instead of a punishment for everyone.
Who’s on the hook (and who isn’t)?
This isn’t aimed at your corner shop. The rules would cover UK businesses with global turnover above £350 million. They’d also cover non-UK companies whose UK turnover tops that same £350 million mark.
That’s a high bar. In fact, Covington’s lawyers point out it’s nearly ten times the £36 million threshold under the Modern Slavery Act 2015. And the older law only asks companies to publish a transparency statement. It doesn’t force them to actually do due diligence.
There’s a geography twist too. The duty for services applies across the whole UK, including Northern Ireland. For goods, though, it only covers Great Britain, because Northern Ireland already falls under the EU’s Forced Labour Regulation through the Windsor Framework.
The new law should line up with two global rulebooks: the OECD Guidelines for Responsible Business Conduct and the UN Guiding Principles on Business and Human Rights. That matters, because companies already working to those standards won’t have to start from zero.
Why human rights due diligence is suddenly a big deal
Voluntary reporting had a good run. The government’s own review calls the Modern Slavery Act “world-leading when introduced.” But standards moved on, and other countries started writing due diligence into law.
Trade pressure played a part as well. Earlier this year, the US slapped new tariffs on UK imports. Why? Its trade office had listed Britain among partners it judged lax on forced-labour goods. ESG Today notes the UK review started before those tariffs. Still, the government openly cited the need to keep pace with major trading partners.
Businesses asked for this too. According to the Ethical Trading Initiative, 33 organisations, including leading UK retailers and brands, wrote to the Prime Minister in October asking for clearer rules. You don’t see that every day. Our read? When companies ask for rules, it’s often because doing the right thing alone puts them at a disadvantage.
Giles Bolton, ETI’s executive director, called it “a huge step forward for workers in global supply chains.” Board chair Philip Jennings put it in a wider frame: “Around the world, more and more countries are making due diligence a legal duty.”
The parts nobody has worked out yet
Before anyone throws a party, here’s the catch. There’s no timetable. The government says it’ll legislate “as soon as parliamentary time allows,” which, if you’ve followed UK politics, can mean almost anything.
Plenty of other details are still open as well:
- Which regulator will enforce the rules.
- Whether breaking them brings civil penalties, criminal ones, or both.
- Whether environmental harm will count. Right now, it’s not in scope.
Campaigners have already started pushing on that last point. ETI wants environmental harms added as the regime grows, plus public sector buying and a clear timetable this parliamentary session. It also wants expectations kept proportionate, so the biggest firms help their suppliers instead of just passing demands down the chain.
Okay, but why should investors care?
Here’s where it gets interesting for anyone in impact investing. The “S” in ESG has always been the hardest letter to measure. Carbon has tonnes. Social risk mostly had promises.
A legal duty changes that. Once big companies have to document how they find and fix labour abuse, investors get something firmer than a glossy report. We’ve seen the same trend with greenwashing, where regulators now want funds to back up their claims. Our post on ESMA’s rules for impact claims covers that side of it, and the UK is already tightening up on ESG ratings providers too.
There’s also an emerging-markets angle that’s easy to miss. The law targets UK giants, but their suppliers sit all over the world. So if you run a factory in Armenia, or anywhere else, that sells into British supply chains, expect more questions about working conditions. That could feel like a burden. Yet it’s also a chance for suppliers with clean practices to stand out.
So, will human rights due diligence actually change anything?
Honestly, it depends on the fine print. A law with a weak regulator and no real penalties could turn into another box-ticking exercise. But a law that can pull products off shelves has teeth, and companies know it.
For impact investors, the takeaway is simple. Human rights due diligence is moving from “nice to have” to “required by law” in one of the world’s biggest financial markets. And as the impact investing market keeps growing, social data you can actually check will matter more and more. The open question is how long Westminster will take to write it all down. We’ll be watching.