HS2 site readied for tunnelling beneath ancient woodland A High Speed 2 (HS2) site in Warwickshire is being prepared for the launch of a tunnel boring machine (TBM) which will dig under the area’s ancient woodland. Midlands-based construction firm Collins Earthworks has finished excavating the north portal site of Long Itchington Wood Tunnel, ready for the TBM’s launch. The company is contracted to HS2’s main works contractor BBV Joint Venture (Balfour Beatty Group and Vinci Construction), which is responsible for building the northern section of HS2 as it heads into Birmingham. Since A...