FYI
Seems to be some updates on the London Thai Embassy website for certain categories of Non O and Non B visas. Gone is the ability to show bank statements of banked money and it now refers to 'income'
The multiple entry Non B visa is now only issued to certain categories of profession and issued for 3 years at £300 (If I am reading it correctly)
Maybe this is why they have held off with the online application if there are some changes taking place?
For dependent child (age below 20 years): A copy of birth certificate, a copy each of employment letter, passport and visa of the parent who is going to work in Thailand, and a copy of registration of the company or organisation where the parent will work
For accompanying spouse : A copy of marriage certificate, a copy each of employment letter, passport and visa of the leading spouse, and a copy of registration of the company or organisation where the spouse will work
For accompanying a Thai spouse : A copy of marriage certificate, a copy of Thai passport/a copy of Thai ID of spouse, and (3 months bank statement showing monthly income of more than £1,500.)
For accompanying a Thai child : A copy of Thai birth certificate, a copy of the Thai child's passport/Thai ID, a copy of marriage certificate to a Thai spouse or divorce paper/child custody paper (in case of divorce), and (3 months bank statement showing monthly income of more than £1,500.)