On first arrival at the tunnel mid-point Karl Roebuck's police car is parked in front of a double-ended STTS maintenance vehicle. In the following wide shot, the police car has vanished and only the STTS remains.
The service-tunnel is depicted with illuminated "MID-POINT" signs marked at distance "436:086". Later on a schematic for the Channel Tunnel is shown, with the international border for the service tunnel marked at 37.902 (kilometres).
The Channel Tunnel is 50.5 kilometres long. When Karl Roebuck first arrives to inspect the body at the service-tunnel mid-point, his police car (KU56 WSW) is seen parked next to cross-passage CP1401, only 3,980 metres from the British end of the Channel Tunnel.