This video was made in the early 1980's by Alyn Stock with David Evans for Mamod. It was used in the larger toy shops on a rolling video tape that just kept playing on a tv screen as an in store promotional advert.
It is understood that Alyn and David set up the railway film set in Alyn's garage and shot all the indoor footage over a weekend. The following weekend the outdoor footage was recorded in the local park.
The video and background information is credited to the founder of Dream Steam, Alan Dunster who sourced the recording and shared via YouTube.
It's a fantastic video and the garden railway system can be seen from about 1 minute into the film - enjoy!