ExGrunt
Many thanks for the info, it all helps to give a better picture of the flight. I left the mob in 1975 for the North Sea so I'm a bit out of date. I wondered if there might be different limits akin to civilian VFR limits for such a flight as this, an A to B flight with civvies on board, but there clearly aren't.
At the waypoint, it would appear that there were grounds for believing that VFR visibility conditions (1000metres) existed.
Just to put me out of my misery, could someone tell me what cloudbase limits for a military helicopter above 140 knots are when vis limits are 5.5 kms?