Been going on continuously for about 30mins but appears to have stopped. Back to the sound of a babbling brook so trying again for some shut eye... Night!
Someone is burying bodies under their patio, obviously.
Any railway lines nearby? They like to do work like that in the middle of the night. I remember one great bank holiday weekend where they closed the line for 3 days but only did any work at night, so we had diggers and all sorts of power tools going at 3am.