As the question is the best visa:

The Non Immigrant O visa based on marriage with a Thai National, reason is that you get 90 days on entry and possible to extend with another 60 days based on visiting wife.

The Tourist visa gives you only 60 days, can be extended once with 30 days (cost 1900 Thb) and after those 30 days you can apply for the 60 days to visit wife but that cost again 1900 thb and an extra half day sitting in an Immigration Office.

Save time and money to apply direct for the correct visa.

You can apply for a new visa before you make your way back, they are stil available

@Chas ********

Keep far away from any police check point and hide to avoid arrest is not leeway.

Already more than 2 months overstay, you are aware that with a few more days you will hit the 90 days and that will save your worries to get back into Thailand for at least 1 year.

The emergency travel document and back to UK was the best option.

Andrei Duzhenko Great, but be aware that it is Immigration who set the rules, not you or your bought tickets

There might be a small issue. The under consideration period is used to consider if your meet all the requirements, one of them is if your marriage is de jure and de facto.

This is done by a visit to your address and can not be done if you spent the time in Korea.

So the worst thing in life is going to happen, you have to discuss with the officer if you can leave and can use a re-entry permit in this period.

Good luck.

Your old passport is invalid to use, you need to use your new passport and fill in the number on the notification form. You need to transfer the stamps before you can register your 90 days of stay.

You signed but you did not follow up what you signed. It could bite you in the a.. when you try to do this again, this counts for Immigration as well as Ministry of Labor.

Be aware what you sign, telling I did not know does not count when your signature is under this text.

The form you signed at Immigration as example:

Talk with your employer

I guess you like to be there to, so you must have a long stay solution, apply for her to be dependent on a foreigner with long stay.