On 8 March the government rejected an online petition to cancel GCSE and A Level examinations because of COVID-19. The reason being that it is not the job of government to cancel exams but down to examination boards and schools. The response also acknowledges the impact on the students of making such a decision. See here:
petition.parliament.uk/petitions/300884
Personally I think the government should reverse this decision and do everything they can to ensure the exams do happen, somehow!