The review has seen less than 2% removed so far, with "misleading" £20 offers still available.
An investigation by The Telegraph found that some companies on the approved list were promoting offers to provide tests "from £20" – but came with catches, including having to travel to Edinburgh to take the test in person and tests not being available until after the summer season had ended.
Some of those still on the list on Thursday (19 August) also had highly critical reviews on consumer review website Trustpilot for poor service including late or lost tests.
