Does anyone know please (1st hand experience preferred) if now that the Thailand Pass has finished, if there is any insurance requirement when arriving at Suvarnabhumi, or, indeed, when checking in for one's flight?

The no requirement for covid 19 insurance now. This infographic has the requirements for entry.

 

Thanks Joe. How about full health insurance requirement for new Non O visa applications from London?  I have a friend just applying.

9 hours ago, SunsetT said:

Thanks Joe. How about full health insurance requirement for new Non O visa applications from London?  I have a friend just applying.

I depends upon the reason for the non-o visa application.

For a non-o visa based upon retirement application it will require 90 days of medical insurance "Copy of health insurance that covers COVID-19 related medical expenses, both inpatient and outpatient, no less than 100,000 USD for the whole period of your stay in Thailand."

Source: https://london.thaiembassy.org/en/publicservice/84508-non-immigrant-visas?page=5d6636cd15e39c3bd00072dd&menu=5f4b6eb3f6ae4b236972c562