A review of 2020 says it was a bumper year for UK tech companies according to new data compiled for Tech Nation and the UK Government’s Digital Economy Council.
There is a good overview of the key data at Tech nation: https://technation.io/news/2020-uk-tech-sector-data/
And a very good presentation of the key data is available online:
https://docs.google.com/presentation/d/1X8YdOlzmMwbSFhdYuREvUpDJWFUeIjRFQm4VCg_ba4A/edit?usp=sharing