Police are issuing a further witness appeal following a collision which took place last Friday, October 17, on Newark Road, Lincoln.
They would like to speak to an elderly couple who may have been driving a small red car that left the scene prior to police arrival.
Both are described as being smartly dressed, 60 to 70 years old; the gentleman was wearing beige trousers and a cream body warmer.
The man who was injured in the collision remains in the QMC in a serious condition.
Anyone with information is asked to contact PC Luke Wells on 101 or call the Collision Witness Hotline 01522 558855 quoting incident number 194 of October 17.