50 % off car road tax

Hi, my husband now qualifies for ‘vehicle tax reduction’ - 50% of the road tax - if you receive the mobility component of PIP at the standard rate.
My question is this, I am the registered keeper, and main driver, he is the second named driver, we pay monthly for our car tax, can I / we claim the 50 % reduction and still pay DD monthly or transfer the car in to his name cancel the car tax and pay the year in full claiming the 50%) I hope the above makes sense. Thanks

The CAB have guidance on this :

Can you get any extra concessions if you have a blue badge? - Citizens Advice Scotland

Can you get any extra concessions if you have a blue badge ? >

Internet search … VEHICLE ROAD TAX DISCOUNT … many other links listed.