Blue badge
https://www.turn2us.org.uk/Benefit-g...#guide-content
You could get a Blue Badge to help you with parking if:
In England, Scotland or Wales, you have been awarded at least eight points for the moving around activity in the PIP test
In Scotland or Wales, you have been awarded 12 points for the planning and following journeys activity in the PIP test
You can find out how to apply on the Financial help if you’re disabled: Vehicles and transport page of the gov.uk website.
Taf I do understand this as according to this I should not have a blue badge as my award was
Mobility
Planning and following a journey - I was awarded (4)
Moving around- You can stand and then move more than 50 metres but no more than 200 metres either aided or unaided again awarded (4)
So it may still be worth your while applying for a badge for your lad.