@Nick *****
If you complete the application via a registered solicitors regulatory authority approved solicitor then they have the right of appeal.
This is where agencies in Thailand fall down as they have no right of appeal
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Here in Thailand offer a fully regulated UK Visa and immigration service in conjunction with our UK sister Company who is fully SRA regulated I hope this is of assistance to anyone looking for UK Visa services
If we can assist you and/or others in anyway please feel free to contact us kind regards