I travelled by car and it was fairly easy to find, although the map indicated to use a nearby car park that we found was for the medical centre next door. There was space (at 8am) for us to park right in front of the centre and it looked like there was more parking behind the building. There were about 3 steps up to the door which were quite shallow and had hand rails, but I don't know if there was wheelchair access anywhere. I was shown into a ground floor reception room to sign in. I think this was a test to see how well I coped with instructions on my own. After a short wait I was shown into another ground floor room for the assessment. I don't think there was any heating in the two rooms despite it being early morning in January.
The assessment took about 40 minutes and I was asked to move around to varying places in the room, and to follow some instructions, which I realised afterwards were probably to test my mobility, and ability to remember more than one instruction given at a time. I didn't notice any toilets, but it was very possible that they were further along the corridor. This is a large old house that is used as an alternative therapy centre so they probably have to comply with certain requirements regarding disabled access etc.