2 months isn't a viable time frame.
This sort of thing needs enough time to allow a new trial to bed in.
Plus you won't get an even sample unless you are proposing the same 2 months for the next 3 years.
That may or may not be the answer, it could just be:-
but we're never going to find out because, as is customary, everything stays the same.
You've got to admire Scouseland for saying 'we're going to trial something different and see what happens'.
It would be great if in January Brighton...