The last I was told by our solicitor (two weeks back) after they'd spoken to PW were that they were expecting completions to run from middle of July through to the end of August but PW didn't have any idea as to which block would be first or which order they'd be running in.
I won't be holding my breath though, in fact the later the better as far as I'm concerned so as to get July & August out of the way.
Julian