oh, I understand. Hmm... non-oa is retirement visa π then you have very few options. But as said I think 8 months away should do wonder but yes IO. π€·
Well seems you have everything but the 10k baht or have it major currency then you have everything on paper so they can't really denied you entry. But yeah I know all up to IO in front of you
And from a outside view you haven't been marked in their system, so I think you will be fine.
You can translate your documents and stamp them in ministry of foreign affairs in laksi if you brought your marriage certificate, then bring them to amphur to get Thai marriage certificate from there you can convert your visa to non-o since married to Thai
Would recommend contact UK embassy in Bangkok to get confirmation