Since some people seem to be fixated with testing and league tables (not I), Dover had 3 MSOAs (local areas with roughly similar population numbers) in the top 200 (by highest number of COVID-19 positives per 100k population) in England for the 7 days ending 25 November. They were: Walmer (9th), Ash & Wingham (60th), and Mill Hill, Upper Deal & Northbourne (197th).
I believe, as of yesterday, Walmer is up to 7th, but there were no other Dover MSOAs in the top 100.
Useful site:
https://twitter.com/UKCovid19Stats