Physical conditions is not limited to just ground conditions and, for instance, may apply to an existing building for; the discovery of asbestos, dimensions not being as shown on as-built drawings, structural materials being different to that expected, etc.
I don't believe that access prohibited by a third party would constitute a physical condition compensation event, as it is not, by it's nature, a physical aspect of the works.
I don't believe that access prohibited by a third party would constitute a physical condition compensation event, as it is not, by it's nature, a physical aspect of the works.