Speaking with Ali in back early July, David Tennant and Michael Sheen were on fine, fine form talking about the second series of Amazon Prime Video's heavenly / devilish show Good Omens - based on the book by Neil Gaiman and the late, great Sir Terry Pratchett - indulging in a nerdy request for some autographs and generally being upstanding and accommodating in a way they truly excel. Warning: contains dad jokes. Because of course it does.