High Speed Rail (London-West Midlands) Bill

Maybe I can help. My noble friend at some stage probably came down the Channel Tunnel while we were building it. We had boring machines boring the tunnels, but there were two caverns for crossovers, which were mined using something called the new Austrian tunnelling method, which involves more or less what the noble Viscount said. It is a big digger on tracks with a revolving arm and cutters that stick out. Something then gets the spoil that goes underneath it, then you spray concrete with re-enforcing mesh on it and put in in situ or precast concrete later. It is supposed to be a lot cheaper; you do not need a boring machine. My colleagues have looked at the costs and they reckon that there is about £750 million to save. It is a very good scheme.