With all due respect nobody can answer that. We can only guess.
If you're coming from the UK, I guess you can expect it to take several months - and even then, there's no guarantee the tough restrictions will have been lifted for foreigners arriving here
I do think Tod's comment about more money than brains was unnecessary but if you visited this forum often you'd see the amazing amount of help he gives people virtually every day for not much money - um, free actually :)
I love the place - some racists in govt won't put me off. I just feel Thailand is getting all sorts of credit for staving off this virus that it doesn't deserve. I tell it as I see it - don't mistake that for racism on my part - and I do recommend living here, great weather/food and people etc. Cheers
Truth be known, Thais are the luckiest people on earth. They have no idea what social distancing means and have got away Scot free. Yet they still like to term this a farang virus. Crazy.