(31 Jan 2016, 9:02 am)Dan 8270 replaced another vehicle on service 4 at Concord around 10:35, and had a trip to Houghton and back before being replaced itself.
It was then allocated to service X88 for the 12:49 X88 service from Concord, and return journey, before going back to the depot. It was then allocated to service X88 again on the 14:49 X88 service from Concord, and, as you say, did not operate the return journey.
(31 Jan 2016, 9:02 am)Dan 8270 replaced another vehicle on service 4 at Concord around 10:35, and had a trip to Houghton and back before being replaced itself.
It was then allocated to service X88 for the 12:49 X88 service from Concord, and return journey, before going back to the depot. It was then allocated to service X88 again on the 14:49 X88 service from Concord, and, as you say, did not operate the return journey.