https://www.motester.co.uk/mot-test-of-lights/Found this article in the MOT Testers magazine on testing of vehicle lights, does not mention that aftermarket LED headlight bulbs are a fail - just that beam pattern must be good....
My Civic going in for MOT next month, will see what tester says about LED bulbs, last year he stated 'aftermarket LED headlights will be an immediate fail after 1 March 2018' - will not be taking it back to them ( our nearest Honda dealer) - will take it to same place that does my motorbikes he seems much more amenable...