Hey ladies... Well I have news but it's not good 
We were all set to exchange today after finally sorting out the arse in the middle of our chain.... or so we thought.
He has just pulled out of his purchase (the second time he has done this!) because at the last minute his sellers were not prepared to drop their price by 20k!!!! So he then tells his buyers (who are our sellers) that he is going to pull out of selling to them and will put his house back up on the market in 4-5 weeks and they can make another offer then!!! Needless to say our sellers have told him to take a running jump.
Our sellers called me to tell us and are so disappointed - but mostly for us! They asked if we still want to buy their house as if so they will start search now for a new property - if not they would stay put. So told them we still love the house and if they can find somewhere soon then we will wait.
We have however probably lost our buyer (who has almost certainly now lost her buyer). I have asked EA to find out what her plans are. If she wants our house still we will not put it back on the market - if she doesn't then we will. We sold it for asking price in under 24 hours last time so hopefully we would sell it again soon. However, I don't want to pull out on our buyer when she has been waiting as patiently as us. If she still wants our house and is willing to sell hers again quickly then we will not put ours back on the market.
Gutted as this is the second time that just before exchange our chain fell through. Means we miss the school application deadline but hopefully we will get on the waiting list once we do finally move.
Will also have to reapply for our mortgage as it expires in 3 weeks - hope we get through the new MMR rules!
One tiny thing to smile about though.... The three EAs involved (who dominate the market where Mr arsehold lives) have all emailed to say that he is an immoral time waster and that no EA in the area has any interest in selling his property for him or in selling him a new property - what goes around comes around 
Thanks for everyone's kind words over the past stressful weeks. I really hope your exchanges and completions go smoothly and hiccup free 
Will no doubt be back once we are back at end of chain again!!