This is a 7 1/4 gauge line. It was opened in 1983.
The line was relaid in 1989 to cross a relocated 1837 140ft span iron bridge (which formerly crossed the River Ness).
Ness Islands Railway
eBay has some items listed which may be of interest. RailScot is an eBay affiliate. Buying an item may help cover the running costs of the site.