They dug the trench on the upper level which contains the ducting for gas and water connections.

The ground has been really varied, there is the crazy sand like stuff- presumably crumbled limestone, seams of rock - or the core of the earth as Andrew likes to call it, and then rich black soil in the area I hope will become an orchard one day!
Off-site, it was all about the design of 'the hub', and finalising the structural details of the retaining walls. So far so good, and only a minor, very manageable drama!