This photograph shows the difference between the 7ft 6in and 8ft wide bodies built by ECW on Bristol L type chassis. Eastern National 1124, RHK131, in fact is a 7ft 6in wide Bristol LL5G chassis with an 8ft wide ECW body while 1107, ONO49, is a Bristol L5G.
ONO49 is now preserved by the Eastern National Preservation Group, click here for a recent photo.

Photo taken by Mike Penn, Saturday 19 September 1964, Prittlewell Garage, Southend