Wife currently stuck in Thailand due to expensive UK quarantine ,could she travel via Turkey and stay for 10 days there to avoid this ?
In a nutshell, yes.
I refer you to the official guidance rather than the word of a stranger on the Internet https://www.gov.uk/government/news/new-system-for-international-travel
Mind you, that stranger is likely more reliable than Grant Shapps et al.
agree with ramblin' on on all points. As long as she has had two approved vaccinations.
not quite yet, and the test rules don't change until nearly Halloween.
I haven't looked - do you know what Turkey's rules are on arrival from Thailand?