Dear Khun Ang Ka,
I aslso had the same problems,and Khun Pempen kindly enlighted me yerterday about supporting documents. The existing checklist on the website couldn't be opened or printed out as you said. However, Khun Pempen told me , after summiting all docs for visa on 12 May, that we need the followings: every original document should also be brought with you.
1 Personal relevant: one current photo of you with white background, its size appears your printout visa application form, one copy of home registration and ID; 2 copies of current and previous passport( if it is with you); letter from your office/ministry stated of your name, position, duration of your work in government service and current salary per month.
2. Completed filled visa application form that u already submited onlline.
3. Visa appointment letter that you has printed out after you submited the visa application online
4. NSG letter of acceptance
5. the Civil Sovice Commission's letter addressed to UK embassy received when signing the contract.
6. Ticket confirmation that Khun Jiraluck sent via email to us.
7.Cash for visa fee that you may buy a check from Bank at the place where we are going to submit the docs.
I think this all we need. I will apply for the visa on 18 May at 10.00 am.
See you
Sadhana