gov.uk/government/publicati...
The government has considered the responses to the consultation and has decided to proceed with the following:
''a new eligibility criterion for people who have an enduring and substantial disability the effect of which is that that person is unable to undertake a journey without there being a reasonably foreseeable risk of serious harm to the health and safety of that person or any other person''
''a new eligibility criterion for people who have an enduring and substantial disability the effect of which is that that person is unable to undertake a journey without it causing very considerable psychological distress to that person''
''a new eligibility criterion for people who score 10 points under the planning and following journeys activity of Personal Independence Payment by virtue of being unable to undertake any journey because it would cause overwhelming psychological distress to the claimant''
It may help to adapt phrases from the Government Blue Badge site to help with your application.
e.g. patients with XP are unable to undertake a journey without there being a foreseeable risk of serious harm to the health and safety of that person from Ultraviolet radiation due to extreme risk of sun burn and increased risk of skin cancer .
Let the XP community know how you get on or if you are having difficulty with Blue Badge applications