Ok - just had a call from Fadesa. They are pushing me to sign the contract TODAY (due to year end and auditing requirements due to the takeover).
They are basically saying that the only official document in place at the moment is the land ownership. Planning applications, bank guarantees, architect plans etc. are all in progress but not available.
In a nut shell, sign and take the risk but get a good price. Wait until everything is in place but pay more.
They were actually ok on the phone, seemed fairly open and matter of fact. They realise that this has been a cock-up and apologise - I also suspect that the take over has not helped....
I'm pretty sure my decision will be no, as I feel very disconnected from what is going on.