Glos Guy,
That aligns with my experience, with regards being the registered keeper of a vehicle adapted for someone else. In our case we bought a motorhome to enable our daughter to travel, since she is unable to fly after her brain injury. We paid for it from our own gratuitous care and expenses settlement after she won the 10 year battle with the Medical Defence Union.
The adaptations are quite substantial including a lift for access (the floor is nearly 4 foot off the ground!), even though she is not a wheelchair user.
In total we saved £60K so not to be sniffed at!
We’re just trying to procure a VW Transporter Shuttle on the Scheme to replace the unloved Mazda CX60.