Hello Clive.
The Devon Challenge starts july 29th though to august 6th
Its is 8 days of field shoots, 2 day shoots at 4 different venues and details are on the
Nfas shoots dates page,
http://www.nfas.net/shootdates.asp
I have not done this but others members of my club have, their view is its good fun but very hard going.the shooting grounds are very different from the flatlands of east anglia.
Best wishes, Mark