Obtaining Degree Notarization for Non Im B

[Barnet]

I have a notarized stamp on my degree from the British Embassy in 2016.  In 2017 a solicitor from the UK also officially notarized it.

 

I have been told I need a second stamp from the Thai consulate before I can apply for a Non Imm B visa.  They have said the 2016 certificate and stamp is now out of date and I need a new one.  Previously I could send this off to Bk and get it back shortly after but I've since been told this is now not available and I have to send the entire lot back to the UK, to Milton Keynes and then onto the UK/Thai Embassy to get the stamp.  

 

However, I have also been told I can still get this document from Thailand directly but nobody seems to know where or how.

 

From the details I have provided above does anybody know the exact procedure I need to take?  Ideally I wish to get this one document (the degree stamped by the British Embassy) as painlessly and quickly as possible.  I am paying a hefty fee to get the Non Imm B visa and I was hoping this would cover everything but it appears that my workplace are insisting on this second stamp by the Thai consulate before applying and the only way the consulate will give me this stamp is by obtaining this document that I already got in 2016.

 

Many thanks