Further to my previous post, some more issues.
The ONS death stats cover England and Wales. They thus exclude Scotland & Northern Ireland. The daily headline death stats INCLUDE both of those. www.gov.uk/guidance/coronavirus-covid-19-information-for-the-public
NHS England (England only) publishes very good (in terms of granularity) daily death stats:
www.england.nhs.uk/statistics/statistical-work-areas/covid-19-daily-deaths/ England
These are recorded against 'date of death' and are published at 2pm effective to 5pm the day before
The headline UK stats are reported at 2pm here
www.gov.uk/guidance/coronavirus-covid-19-information-for-the-public
and seem to represent 'all deaths reported between 5pm the day before yesterday and 5pm yesterday by the NHS in England, Wales, Scotland and Northern Ireland'
Therefore this is 'daily reports' that is being broadcast in the news rather than 'daily deaths'. Clearly due to staffing issues these are not the same thing.
For England (source NHS England above), we can see there is in fact a big delay, of the 758 deaths announced between 17:00 5/4/20 and 17:00 6/4/2020, only 81 (11%) deaths occurred on the 6th of April. Thus for today (7th April report) 'deaths' we are actually looking at deaths which mostly occurred on the 4th and 5th of April.
If we look at the individual daily reports (not total deaths to date), then for 2nd April we can see 22 reports in for Sunday 22nd March, 5 more for on the 3rd, 5 on the 4th and 2 on the 6th. So as of 1st April, there were 95 deaths recorded as dying on 22nd March, but that's now up to 129.
If we look at the following Sunday 29th March, we see there are now 556 deaths recorded, which were announced:
7th - 6
6th - 5
5th - 25
4th - 57
3rd - 62
2nd - 130
hence 271 deaths recorded on 30th/31st/1st, and 295 since then
If we look at, say, last Wednesday, the 1st, the reports by day of report:
5pm 31 March to 5pm 1 April (2nd April publication) - 84
1-2 April (3 pub) - 179
2-3 April (4 pub) - 134
3-4 April (5 pub)- 51
4-5 April (6 pub)- 14
5-6 April (7 publication) - 33
If we look at the daily reports then for:
4th April most recent 4 days (3rd, 2nd, 1st, 31st): 99, 199, 134, 26
5th April (4,3,2,1) 97, 181, 114, 51
6th April (5,4,3,2) 70, 188, 69, 25
7th April (6,5,4,3) 81, 272, 179, 90
So for Friday the 3rd the reports go D+0 99, D+1 181, D+2 69, D+3 90 (439)
for Saturday the 4th D+0 97, D+1 188, D+2 179 (464)
for Sunday the 5th D+0 70, D+1 272 (342)
So in general Friday's deaths are most likely (NB not majority) to be reported on Saturday (a day later), which is published on Sunday.
Saturday's deaths are equally likely to be reported on Sunday or Monday.
Sunday's deaths are less likely than usual to be reported the same day.
So for today's report we are including MORE deaths from Friday, Saturday and Sunday than we would on any other day, since it's a Tuesday publication based on Monday's reports, and the normal flow of death reports from is therefore disrupted.
The new reports for yesterday only is 81, which is the best 'first day reports' in a week. But we of course don't know if the 'first day reports' are themselves delayed because of the backlog from previous days.