Managed to get some feedback as to what has been going on. Greg and his family 'have' moved out of the house and from what I have been told, they have no intention of going back in.
Scott called yesterday and told me what had been transpiring. A week or so ago, The family had been asleep when it would seem they all awaoke at the same time due to the feeling of not being able to breathe. Needless to say, this was a bit disconcerting. Gregs wife started flailing around, but neither of them could get up from the bed. This lasted for about a minute alledgedly. Then, as soon as it had come, the feeling went. They could both move again and Gregs kid was screaming in his room. Obviously they both ran to the kids room, but as they got to the landing, they both heard the door to the back bedroom click closed. They didnt see the door, but (and even I remember this as it was a distinctive springy sound) as the door closes, the catch kind of resonates once it is shut. Its an old sprung ball and socket type of catch, while all the other handles on the doors, have to be turned to open. This added to the already monumental fear.
They got their son, who it seems had experienced the same thing, got the car keys and turned up at Gregs Mums house at about 2.30am.
When I heard this, I wasnt too shure how to react. But when I saw the for sale sign on their house, I guessed something must have been wrong as they are selling their house at a current 15K loss to themselves. Something seems to have scared them so much, they are willing to pay £15,000 to get out of there.