Can I qualify for a Covid visa extension due to mandatory quarantine in the UK?

The individual is inquiring whether the UK's mandatory quarantine requirements could allow them to qualify for an "unable to travel" Covid visa extension while currently on a visa exemption in Thailand. Responses indicate that applying for the extension before September 27th may be key, with several comments suggesting that many British travelers have successfully received similar extensions. There are also discussions regarding the financial implications of the UK’s quarantine policies and how these could affect one’s ability to return home, which might be relevant for the visa extension application.