Charlie
I would advise you to have a look at the latest version of the PIP Claim guide as the issue of prompting is covered in there and in regard to the Going Out Descriptor.
There is currently no UTT Decisions in regard to PIP and there are unlikely to be for at least six months, the Lower tier has only just started hearing appeals themselves.
UTT Decisions for all benefits are available (at least in principle) on the following site.
www.osscsc.gov.uk/Aspx/default.aspx Gordon