Leyland PD3/East Lancs 347, MHJ347F, in Southchurch Road.
This was an early Saturday morning duty involving a short 6 (Bus Station to Newington Avenue), short 17 (Bus Station to Temple Sutton - see here) then a 27 to Canvey.

Photo from the Peter Cackett collection, photographer Jack Wilkinson, taken Southend Victoria Circus, Southchurch Road