West Herts. Area Group of the Association of 16mm Narrow Gauge Modellers
Additional Videos on YouTube
https://youtu.be/i_GSB-1Nl_s
https://youtu.be/V8SGdnGMBPM
https://youtu.be/Lsntxjtnkcw
https://www.youtube.com/watch?v=xVZeBHBtc9U