//Perhaps one area has many aged 80+ and the health professionals are working their way through the list.
Perhaps in another area, all their 80+ residents (who want it) have received their jab so they have moved on to the next age group.//
//maybe there are concentrations of 80+ yo in some areas, such as traditional retirement spots? If each area had 100 vaccines to give, but one area had 200 80+ year olds and one had 2, the area with 2 would expect to be doing others quicker//
So let’s have a look, then.
Up to yesterday, in the North East and Yorkshire 204,140 over 80s had received their first dose. This represents 45.9% of that age group meaning there must be 444,750 over 80s in that area. In London the figure was less than half that – 92,398 or 29.2%. This means there must be 301,950 registered over 80s in London. So London has only two thirds of the numbers of over 80s than there are in the North East. So if they were being vaccinated at the same rate you would expect London to be completed much earlier. If the rate of delivery has been adjusted so that they should both finish together, then London is still way behind.
The only possible explanation for such a discrepancy (apart from bureaucratic ineptitude) is that a large number of invitations could be issued but not responded to. There could be some mileage in this:
https://www.standard.co.uk/news/london/covid-vaccine-newham-london-numbers-b871758.html
But I cannot believe it explains all of the discrepancy between London and the North. Ignoring the age group split, London has administered fewer that 200,000 doses. The Midlands has managed less that 200,000 doses whereas the North East has managed 370,000 and the Midlands 387,000.