Before we condemn the pilots I noticed that one of the local newspapers noticed a large number of birds around the aircraft and concluded they had been pheasant shooting in the UK? I had seen the UK chart earlier and it did not seem like pheasant shooting weather to me. Perhaps this is a clue, as I had seen a large number of ducks in the area a few days before flying in formation.
As for a GPS approach High voltage power lines in fog generate a large amount of interference. In hindsight a safe look at the conditions knowing a safe diversion airfield is in reach, and next thing all the holes in the cheese line up fast.
Last edited by JamesGBC; 13th Jan 2014 at 10:00.