Under the contract, the kits are sent to the public and to places such as nursing homes, and then delivered to Randox to check the pads to see if the individuals have the virus.
In a statement, the Department of Health and Welfare said it had been “informed that certain test kits produced by Randox laboratories may not meet our safety standards required for coronavirus testing”.
The DHSC did not explain the nature of the problem. He added: “As a precaution and while we investigate further, the NHS test and trace requires that all parameters suspend the use of Randox test kits with immediate effect and until further notice. The safety risk is low and the results of Randox kit tests are not affected. “