A biker remains in a serious condition in hospital nearly three weeks after a serious crash on the A2. Police are appealing for witnesses to come forward following an incident involving a blue Nissan Qashqai and a black Honda XL-125 motorcycle, on the coastbound carriageway near Dartford Heath . The motorcyclist, a man in his 20s, was treated at the scene just before the junction to the M25, and taken to Kings College Hospital on July 28. He has remains in a serious but stable condition in hospital. Investigators have spoken to a number of witnesses but would like to hear from anyone who may h…