@Ally ***********
thank you for all this advice, all this is quite similar to what we have been informed that needs to be done by the immigration. If getting it certified at British embassy in Thailand works that would be amazing , as getting it to the Thai Embassy in the UK is quite difficult. Am definitely considering an agent at the moment and as you said have to find one ASAP as they want funds in the bank account for 2 months before applying for the new 1 yr Visa ..
Thank you for the help, Much appreciated!!