No. The multi entry went some time ago, from the UK several years ago in fact (I used to get them!). And the current financial requirement for a signle non-O from the London Embassy website is as below (it can be UK or Thai account).
"Financial evidence showing monthly income of no less than 40,000 THB (£1,000) or having the current balance of 400,000 THB (£10,000), e.g. bank statements, proof of earnings
- Applicant’s recent official UK/Ireland bank statement shows your name, address (Screenshots are not accepted). For monthly income of last 3 months no less than £1,000/ month."