Anonymous participant Book an onward ticket. A bus from Nong Khai to Vietiene is about 140 Baht online. Enjoy Singapore. I lived and worked there for just over 10 years.
Do you have to prove 1) just that you are in the UK or 2) That you are resident in the UK. There is another post where a UK citizen is having difficulty proving the latter as no utility bills etc
Sponsorship is usually for dependents. There have been a couple of examples posted of a parent or relation sponsoring which I think were from Australia. Not every embassy accepts sponsorship even for family members
People are 100% still using agents for the money. Yes, there are issues with Bangkok Bank and mainly in Pattaya. There are other options. Most of the well known agents are acting as per normal again.
Are you going to Singapore just to get another Visa Exemption or do you needs/want to be there? If just for the new VE why not just get a 30 day extension at Immigration. If you need/want to go you should be fine entering again on another exemption.