Sterling account in Thailand fine, make sure u make it known to immigration it's a sterling account. Even though the bank gives u a letter reverting it into bahts the questioned my bank book thinking it was in bahts. Expect them to ask u to update your book after 10 days of application... They seem to be checking incase it's not your money, apart from that it's pretty straight forward . I don't know about the seasoning as I had not let mine go below the requirement since I had the account.
I would talk to arawan namak, you will get contact on Facebook. She deals and has contact with most of the Thai insurance firms. She is honest and will get u the best quote for your needs
think it's not used now. After quarantine the hotel should take your seven day result. U send them a picture and they deal with it. Of course im taking your TEST AND GO . Ask reception I went through this system one month ago.
U have 72 hours B4 u check in for Ur flight. If u have a stopover it is Ur first flight. Make sure it's a RT PCR test. When I flew 3 weeks ago there was a debate going on at check in about PCR test. If u get the 48 hours test or better still same day result test u can work Ur time from that.
I had about 1.2 million pounds until I started coming here 20 years ago. Now I have 2 houses , 2 dogs, 3 motorbikes, 3 children ,1 African grey but I'm still happier than when I had the 1.2 million.