The Tri-ang Hornby Freightliner train set (top photograph) was available for just three years - 1968, 1969 and 1971. It contained a Class 35 'Hymek' Diesel Hydraulic locomotive (D7063) plus three Freightliner wagons, each with three standard 20ft containers with opening doors.
This set came without any track and I suppose it was, what would now be called, a train pack. Its catalogue number was R.645.
Tri-ang Hornby then introduced the operating Freightliner Depot Crane (middle photograph) in 1969 and the instructions on how to install and operate it are shown in the bottom photograph. The idea being to facilitate the transfer of containers from one freightliner wagon to another or from a wagon to a lorry.
This had a catalogue number of R.675 and but I am not sure for how long this particular set was produced although I am guessing it would have only been for a couple of years.