(18 Aug 2013, 7:35 pm)BJ10VUS wrote I think Compass run one journey per day?
No, one board (admittedly often allocated one of Deptford's yellow MPDs which later ran onto the 592 if I am correct) was taken on by Compass, while GNE retained the other which was allocated the usual SR.
So they alternate hourly, one being done by GNE and the other by Compass.