The Lesney staff bus fleet was well known for its former London Transport RT types, some of which lasted long enough to gain the final "Stagecoach" style livery as shown here on KGK675 (the former RT1206), roaring down the narrow West Street in Rochford.
Note the destination board for Hullbridge (abbreviated).

Photo taken by Richard Delahoy, Wednesday 23 May 1979, West Street, Rochford