Can I stay in the UK for several months while holding a Thai visa extension?

The original poster holds a visa extension valid until July 2021 due to marriage to a Thai national and is concerned about traveling to the UK for family reasons. They question whether leaving Thailand from October 2020 to February 2021 would invalidate their visa extension if they miss their next 90-day report due on December 6th. A commenter clarifies that 90-day reporting is unrelated to the extension's validity, stating that since they will leave before the 90-day report is due, they can return to Thailand without issue.