Aah, I was fooled by the plan I was looking at (http://documents.reading.gov.uk/AnitePublicDocs/00231192.pdf) showing a temporary access point at 58920 as 139 Cardiff Road, when as you say it appears it was actually at 193 Cardiff Rd. You may be right about the new building site being at 58700. However Google Maps shows the new retaining wall stretching from 137 to 149 Cardiff Rd and there is also structure marked on the plan at 58660 at 147-149 Cardiff Rd, which is shown to be a retaining wall in the detailed plan (http://documents.reading.gov.uk/AnitePublicDocs/00231210.pdf , Sheet 2 of 5, on page 3!). However the depot plan certainly don't show a building in that area at all or even a retaining wall of the size built, so I think the conclusion that the development is not in accordance with the 2010 prior approval stands.