Prince Harry has renewed his lease on Frogmore Cottage which will allow him to deputise for the Queen - should he need to, according to reports.The Duke of Sussex, who lives in California, is still eligible to serve his grandmother as one of her four Counsellors of State because he qualifies as being "domiciled" in Britain thanks to his old Windsor address, The Sunday Telegraph reports.This means Charles, William, Harry and Andrew - the four adults next in line to the throne - can fill in for the Queen at her request should she fall temporarily ill.The news comes as it was revealed the Queen had tested positive for Covid. Buckingham Palace confirmed the monarch was experiencing "mild cold-like symptoms" over the weekend.