I've just found this petition which someone has set up to make the recording of PIP assessments mandatory: https://www.change.org/p/parliament-mandatory-recording-of-all-pip-assessments
In our case, it would certainly back up the fact that we told the assessor that caree made a half-mile trip pushed in a wheelchair, and not walking!
In our case, it would certainly back up the fact that we told the assessor that caree made a half-mile trip pushed in a wheelchair, and not walking!