Eastern National's experimental Bristol LDL / ECW (it had chassis number LDLX.004 and body number EX4), CR2510, 236LNO. A prototype flat floor bus for the later FS(F) and FL(F) classes.
H37/33F, new 1958 and when withdrawn in February 1977 was EN's last closed top rear entrance bus. It lasted a few months longer than the last LDs and two FSs (it even outlasted some newer FLFs) due to its extra length and seating capacity.

Photo taken by Eric Thompson, Saturday 12 January 1974, Colchester Garage