5 months and 8 days.
Application forwarded to UKVI on 19 May, processed visa application received at UKVAC on 26 October.
160 days.
No idea about impending increases.
From: https://ukvisa.blog/2022/02/03/uk-visas-for-thai-nationals/
PROCESSING TIME
The UK visa processing time service standard for non-settlement applications (such as visit, study, work) from Thailand is usually within 3-weeks. Since March 2022 due to Ukraine Scheme, the processing time has increased to 5-6 weeks.
To fast track visit, study, or work visa applications within 5 working days from Thailand, UKVI has resumed the priority service. The priority visa UK fees in Thailand are $314.
UK visa processing time service standard for settlement applications (such as spouse, partner, join family) from Thailand is 12-weeks or 60 working days. Since March 2022 due to Ukraine Scheme, the settlement visa processing time has increased to 24 weeks. Moreover, the 6-week priority settlement visa service has remained suspended.