AS I noted above Unicorn but ow been able to Loo closely at the data it seems mostly the North East (and just a few from Yorkshire too) that were removed today.
Yorkshire is well down but North East down so much it has a MINUS number. At - 576 - so I would say nearly all the 850 came from here as it normally gets about 250 on a normal day.
Yorkshire still clocked up more than the North West today - despite being over 300 lower than last few days. But not by much as North West fell only by 99 to 668 - though that week to week is down from 770 last Saturday.