Full marks for Kevin. I followed up on all the Lea Frances posts. I wrote to the Pre 1937 Registrar of the Lea Frances Owners Club and had an immediate response as quoted below. I had presumed that the car in the photo didn't have running boards, it looked to me as the ground had a white line or such.
Thanks Guys.
Brian.
"Yes, the car is a Lea-Francis. It is an S Type, Hyper Tourer with a Cross & Ellis fabric body. It is most likely a 1928 or 1929 car."