(23 Jun 2014, 10:12 am)Andreos Constantopolous wrote Yup, one will have been a normal allocation and the other the spoiler Metrorider (which was usually empty).
It was the same in south shields when stagecoach and catch a bus went into major competition with the x20 and c20. The original X20 departed shields at 00 and 30 the C20 departed 5 mins earlier and then stagecoach or busways at the time put a spoiler on at 50 and 20. A couple of times the spoiler was actually operated by the preserved 1/1801 ECU 201E with its unusal 3 by 2 seating arrangement