Ryanair today notified me of cancellation of my flight EDI-TLL on 16 Sep.

The email subject is "Ongoing government restrictions have forced the cancellation of your flight"

This seems untrue - I can see no government restrictions prohibiting flights between UK and Estonia as of today (there is a quarantine requirement for some arriving passengers in Estonia, but that is nothing to do with operation of the flight).

The Ryanair chat agent was unable to tell me which "government restrictions" had caused cancellation of the flight - all they could say was "the flight has been cancelled due to Covid".

The email also says "As you have been given over 14 days’ notice of this cancellation, no entitlement to EU261 compensation arises" which is clearly not true - it is less than 5 days notice.

I reckon the flight has been cancelled for Ryanair's convenience and I am therefore entitled to EUR 400 compensation because the flight is >1500 km.

Is my thinking correct?