UK Opens New PET Imports Safeguard Investigation
If you have never thought about polyethylene terephthalate, or PET, you have almost certainly used it today. It is the plastic found in many drinks bottles, food packs and some textiles, which is why a dry-sounding government notice about PET imports matters more than it first appears. On 5 August 2026, the Trade Remedies Authority said it had opened a new safeguard investigation into PET imports to the UK. According to the UK government announcement, this is the first new safeguard case the TRA has started since the body was created after EU exit in 2021.
The case was triggered by an application from Alpek Polyester UK, a polyester producer based in Redcar. The TRA will now test a very specific question: has PET been entering the UK in such increased quantities that it is causing serious injury to domestic producers? That wording matters. A safeguard case is not about whether imports exist at all, or whether foreign goods are simply cheaper. The point is to ask whether a rise in imports has become so sharp that UK producers need temporary protection while the evidence is examined.
The scale of the market helps explain why this is getting attention. The TRA says total UK imports of PET were worth more than £300 million in 2025. For a material used across bottles, packaging and fabrics, that means any new trade measure could be felt by manufacturers far beyond one factory or one town. **What this means:** this is not just a story about one company. It touches businesses that make PET, firms that buy it to turn into products, and the supply chains that sit further down the line.
If the TRA decides a safeguard measure is justified, the action would be emergency and temporary. The government notice explains that such measures can apply to imports from around the world, although there are some exceptions, including for certain developing countries, and they may involve an extra duty. That makes safeguards different from two other trade remedies allowed under World Trade Organisation rules. Anti-dumping measures deal with goods sold abroad below their normal price, while countervailing measures address subsidised imports. A safeguard, by contrast, is about a rise in volumes that may be causing serious harm.
The investigation period runs from 1 January 2021 to 31 December 2025. In plain terms, the TRA will be looking across five years of import and industry data to see whether the numbers show a clear increase in PET coming into the UK, and whether UK producers can show serious harm linked to that increase. **What to watch for:** an investigation opening is not the same as a decision. No new measure has been announced yet. What has begun is the evidence-gathering stage, where the authority tries to separate concern, pressure and proof.
The government is encouraging affected parties to come forward quickly. Businesses and other interested groups are being asked to register through the Trade Remedies Service by 19 August 2026 so the TRA can consider a fuller picture of what is happening in the market. That invitation also covers firms both upstream and downstream. In everyday language, that means businesses that supply inputs as well as businesses that buy PET to make products such as bottles, food packaging or textiles. The TRA has also opened a PET business survey, and new developments will be posted on its public file.
For readers trying to make sense of the bigger picture, this case is also a reminder of how UK trade protection works after EU exit. The TRA is the independent body that investigates whether new trade remedy measures are needed, and it operates at arm’s length from the Department for Business, Science, Innovation and Trade, according to the government background note. So while the subject may sound technical, the question is actually straightforward. When imports rise, when does healthy competition become serious harm? That is the test the TRA is now being asked to apply to PET, and the answer could matter for UK manufacturing, importers and many everyday products.