The move comes after U.S. Customs and Border Protection in October banned imports from Supermax over alleged labour abuses. Canada has also put on hold its contract with the company due to similar concerns.
London-based Wilson Solicitors said it had asked Britain's NHS supply chain to reconsider a December decision to award Supermax with a framework agreement to supply personal protective equipment, citing concerns over the U.K. government's due diligence in light of the forced labour allegations.
"The legal requirements are clear that there should be real verification of suppliers before the award stage, but it is not clear that these necessities have been met," Nusrat Uddin, the law firm's lead lawyer on the case, said in a statement.
The request for a judicial review is expected to be filed at London's High Court on Friday.
Britain's Department of Health and Social Care said it had made strong commitments to eradicate modern slavery from all contracts in the government supply chain, and would not hesitate to investigate claims made against manufacturers.
"A proper due diligence process is carried out for all contracts and our suppliers are required to follow the highest legal and ethical standards. We cannot comment further at this stage," a government spokesperson said in an email.
Supermax did not immediately respond to a request for comment.
It said this week it will introduce a new foreign worker management policy and enhance its current human resources policies in response to the allegations.
The company, which has supplied millions of rubber gloves to the NHS under an earlier agreement, is among five Malaysian glove makers to have faced a U.S. ban on their products in the last two years due to suspected forced labour practices.
The British government in November said it had placed an order in July for 135 million gloves from Supermax at a cost of 7.9 million pounds ($10.70 million).
($1 = 0.7383 pounds)
(Reporting by Liz Lee; Writing by Rozanna Latiff; Editing by Ed Davies and Sanjeev Miglani)
By Liz Lee