I had been told that you need to contact DVLA and get a number from them that is taken to the dealer.
Umm never heard of that one Brydo. Who told you that? It has nothing to do with DVLA as all the info is on your license.
You might find this useful Brydo https://www.motability.co.uk/information-for-customers/cars-and-wheelchair-accessible-vehicles-customer-area/temporary-replacement-vehicles
Joss
Current car: BMW X2 sDrive 20i M Sport 5dr Step Auto In metallic Portimão Blue. 04:10:2025
Previous car:Peugeot 308 GT Premium 1.2 Pure tech Petrol.