I'm now very happy to say that we have a large trench in the road, pointing in the direction of the gas main! Everyone arrived this morning and they've been digging all morning - it looks almost done.
There are traffic lights and everything. This morning, as the man was setting up the traffic lights on a completely clear road, some poor guy in a car obediently stopped at the lights and stayed there for about 5 minutes until he realised that the road ahead was completely clear and the lights weren't going to change.
There are big diggers and dumper trucks too. It's amazing how much rubble comes out of a little trench.
Meanwhile the heating system proceeds in the cave - the water tank is going in just now to get all connected up.