Pity to hear the bad news Nigel. I note this is the first I have heard of this project. Maybe regular updates on here, even an idea of the location, would have helped.
The original Exeter club, decades ago, was at a farm and you can still see the outline of the track on Google Earth. Not sure how/why it stopped. The new EDMES has made major progress over 3 years and hope to have a full circle complete at St Katherine’s Priory mid summer. It is largely a handful of very keen organisers that boost it along.
At our public running yesterday a member had visited Taunton who it transpires had in just 4 years built an extensive multigauge track (2 1/2 to 7 1/4 ) both ground level and raised in just 4 years. Again we didn’t hear anything about it on here.