options:
1. Fly back to UK and wait till this situation is over
2. Find a country where you can fly to, get a new visa and come back into Thailand
3. apply for the 1 year Extension of Stay at immigration office if your employer can meet the requirements.
You may look at this list of countries and precautions to see if you can go there. Good luck
*******************************************************************************************************************************************************
**********
*****
*****
.htm?fbclid=IwAR0SyKepeULtEye5VxnHroCRw_AAFS0kuF39S-8WFeW8URb20qSLgsdpl6M