Who knows? I doubt it is a service route running across the house, looks like an old foundation. I would nibble at it very carefully bit by bit. Oh and if it starts to tick stop and run!
Any idea what was there previously? www.old-maps.co.uk might give you an indication of any past structure that may have stood there. If not, assume there is something under it and proceed with caution. Hitting a gas or electricity service isn't cheap. Or recommended....
Depends what you have on your hands and feet it seems! Neighbours had a Power cut on Sunday last, soon found out it was only about 6 houses affected, (mine was still on). Western Power arrived and proceeded to excavate to expose the fault. I went out to offer them a cup of tea later in the evening, they were jointing new cable to old. Live.....
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