Hello,

For my wife's visa I am supplying (among other things) tax return statements for 2 years as requested, a letter from my employer and a YTD payslip from my employer showing my income so far this financial year.

Is it necessary to also supply a bank statement? After an expensive wedding its dipped and dived at times and currently holds about 100k baht.

I did do a search but didn't find anything relating specifically to this.

Nope. Doesn't ask for bank statements as proof, only your payslips or tax NOA (unless self employed). If they're not deemed to be sufficient then you may be hit with a AoS however I've not heard of many being requested.