Rear view of Eastern Counties LFS46, 46CNG, Bristol FS / ECW, new in May 1963. Most of EC's 120+ FS's and FL's had rear platform doors but a small batch had open platforms. This batch was withdrawn earlier than those with doors, soon after this photo was taken, and some, if not all, were cut down to breakdown tenders.
I photographed the same bus, nine years before Eric, in Lowestoft - click here to see.

Photo taken by Eric Thompson, March 1973, Castle Meadow, Norwich