Driving in the UK on French "WW" plates

Is a car with provisional French registration “WW” plates authorised to drive in the UK? This is just for a short return trip to visit family, not for importing the vehicle into the UK.

Hi,
You can usually use a vehicle with foreign number plates without registering or taxing it in the UK if all of the following apply:
•    you’re visiting and do not plan to live here
•    the vehicle is registered and taxed in its home country
•    you only use the vehicle for up to 6 months in total - this can be a single visit, or several shorter visits over 12 months
You will need to register your vehicle if you want to move it between Great Britain (England, Scotland and Wales) and Northern Ireland.
Importing vehicles into the UK