Change text below cases map (For release on Thursday 5 August 2021)

[DaveJephson]

Change the text in the "Case rates" section below the vaccination map.

This change should be implemented around the update on Thursday 5 August 2021, and the text should read (change noted in bold):

Case rates are shown per 100,000 people for the 7-day period ending on the date shown.
We calculate this by dividing the 7-day total by the area population and multiplying by 100,000.
This makes it easier to compare cases across areas of different population size.

For local authorities, the population used is the mid-2020 population estimate from the Office for National Statistics.
For Middle layer Super Output Areas (MSOAs), the mid-2019 population estimates are used.