OP, you should be ok to return to Thailand visa exempt especially with proof of return flight.
Have had copy print out.
You mention AO....
Do you mean a non O-A? That you would obtain in UK? Not good option
Edit: you state ...." I'm tempted to fly back this month (probably the 17th) for two weeks or 10 days to help with the move"
You serious. One of the many things I find amazing about Thailand is that you can any level of assistance from services here.
Stay in UK and send folding to help with move.