I think a possible better option, after chatting with friends about this, might be a much longer paper BIT with many more options to select from, and less to to have actually do. So students don't have to have covered the entire curriculum, but can question spot from the sections they have done.
Not sure I've done a very good job if desire go what I mean though.
Can't see how pushing exams back by 4 weeks will equal 13 missed school now though.
And what about the marking time? Will results day then be pushed back to allow for examiners to mark, and get grades in place. But how can it be pushed back when sixth form entry and university entry rely on it.