 Detailed route plans published in January 2012 indicate a link which runs from a tunnel exit just west of the former Primrose Hill railway station, eastwards along the route of the North London Line and joining HS2 at a bridge junction on the west side of York Way.Estimated journey times for direct trains running between British cities and Paris were published by HS2 Ltd in 2012.These estimates assumed a high-speed rail journey using both HS1 and both completed phases of HS2