One of the dual door jumbo,s, used on the 18s mostly when I worked at Yardley Wood, and down to first gear up Parsons Hill with a load on, hated doing the number 4 run, was it 15 mins round trip to Cotteridge and back and 11 trips, or was it 11 mins, run and 15 trips, sure it was one or the other, know it was boring way to spend an afternoon.