Diplomatic Corps gorget patches ?

[natal01]

I recently bought these gorget patches in a job lot and have been struggling to identify them. I have a feeling that they are diplomatic corps , but dont have any proof of that. They are two different designs . Does that signify different rank ? If so, what rank ?
I know that this is not mainstream militaria, but could be viewed as a "fellow traveller ". Can anyone help ?
Many thanks
Mike