Hi Ken
I have a 1949 Light 15 and small springs are fitted to all the posts. I have just overhauled the brakes and found a classic car specialist had fitted two short linings on one side at the rear and the long linings on the other side some 4 years ago. I did not notice a problem and the car came with an mot, so I wonder how necessary the short linings are. I have reassembled the brakes correctly.
Cheers Richard
Richard Larter