The Daily Post is reporting a Griffin down. Some sources state 4 POB and some 6 POB but all safe. 4 POB appears to be confirmed by MoD (below).
Indications that R936 may have already been on a job and R187 attended. Uncorroborated.
Daily Post also carries the following.
A Ministry of Defence spokesperson said:
“A Griffin training helicopter safely completed a precautionary landing in Snowdonia this afternoon following a technical issue. All four people on board exited safely, subsequently the aircraft caught fire. Emergency services are on the scene.”