I've done a rough and ready graph comparison of the daily reported deaths we've been tracking, vs the timestamped deaths in the NHS England spreadsheet.
The data is all DAILY NEW cases, not cumulative.
The Orange bars are the daily reported stats we hear on the news every day. Once released, they will not change. A new bar is added each day. Otherwise the orange bars stay static.
The Blue area, though, is the daily data from the England Spreadsheet.
This is the REAL data of how many died on each actual day.
It is a moving picture. Deaths get added to the day retrospectively, as and when test results are returned or post-mortems.
Only after all the data has been properly swept into the correct day and no more deaths are outstanding, will the final picture be known.
This blue area will grow and change every day as it is updated
The blue area, actual timestamped deaths, will grow upwards, and it will grow to the right. It will grow upwards ON the right, and the far left will not change much.
This is because the data in the England spreadsheet is incomplete.
It is added in dribs and drabs. Yesterday's deaths will only include a small fraction of the true deaths yet. It's too early for them to have hit the figures. Deaths from a month ago will probably be fully complete by now and will no longer change.
This becomes obvious when you look at the graph. You can see the point at which we are only getting a fraction of the day's real data.
Some points to note:
The Daily Stats (orange bars) include England, NI, Scotland, and Wales.
The timestamped data (blue area) is ONLY for England. It ought to be smaller in comparison, but it isn't.
If I was to update this graph each day we would be able to see the point at which the data stopped changing, on the left first. We would be able to say something like, "March 12th deaths haven't changed for a week, they are probably accurate and finalised now. But March 29th continues to be updated and grow every day, those figures are not yet accurate"
TLDR:
Orange is what we are being told daily, for the entirety of the UK.
Blue is what has actually happened, in England alone, and is as yet incomplete, especially the very recent days.