So the council cannot suspend the bay for the parking of Diplomatic Vehicles as there are no provisions on the order for doing so. Therefore, the suspension is invalid in that respect.
Also, a TTRO would be required to suspend the bay, however, the council are yet to provide this. Therefore, it is possible that they haven't suspended the bay at all.
However, as they haven't allowed dispensing a bay for diplomatic vehicles in their Traffic Management Order in the first place, they were unable to suspend the bay for diplomatic vehicles, which takes me back to point one.
The sign is also non compliant as I found their approved suspension sign and they have omitted the flap at the bottom, which is the only approved sign from the DfT.
I find it funny that they haven't provided the TTRO and it seems difficult to get hold of. Essentially, if they haven't suspended the original TMO/TRO they have essentially still got a pay by phone parking bay with a meaningless yellow sign with some fancy writing on it.