For those asking about if or how Tier 3 has been working (or not) - here are the Liverpool numbers from 6 October - a week before those measures came in and last two weeks.
Is it working based on these - or not?
Wk starting 6 Oct 562, 584, 576, 454, 358, 456, 562, (Weekly Total 3552)
Wk starting 13 Oct 493, 433, 442, 383, 336, 265, 516, (Weekly Total 2868)
Wk starting 20 Oct 409, 384, 356, 294, 204, 207, 314 (Weekly Total 2168)
These are the actual numbers for that date AFTER reallocation to the day. Up to 26 Oct - last reliable date to have all tests allocated.
I think that suggests there has been an effect and the numbers in that city have obviously fallen.
Whether it is coincidence, the school/university numbers waning and being why numbers were high before them, or the tier three restrictions - another matter,
But the data falling is clearly real.