In August, Lord Tyrie criticised the CMA and the government for their management of the tests. He told the BBC that the problem has resurfaced since the summer due to the government’s "carelessness".
"It was a scandal waiting to happen and it is now happening and it needs very urgent action if we’re to have to have a reasonable chance of protecting thousands of consumers," he added.
"To allow this to continue over the peak Christmas period would be scandalous. Other countries seem to have done better - we’ve got to try harder".
