Removing Private Plate

[JB89]

Evening all,

I'm (hopefully) buying a used car tomorrow privately, however it's currently got his private plate on it. He's suggested he can simply remove his private plate online and I can tax the car using the previous reg and drive it away straight away, is this correct? When I go to tax the vehicle obviously the V5 document number will correspond to the private plate?

Should I really be waiting until all paperwork is back in the original reg?

Cheers

[JB89]

Thanks all - will wait until the V5 is received under the previous registration before purchasing.