Firstly read the following threads:-
To answer your questions in order:-
1/ Scanning started in June 2010
2/ The first treatments started Oct/Nov 2010
3/ As of this week they have only done a little over 40 procedures so it's early to start drawing major conclusions - However my partner was liberated there this week you can read the thread - I've linked to it above.
4/ Expensive compared to what and who? They are currently the only UK option that is open and up front. Having seen my partner treated there, there is nowhere else would prefer to have gone, the treatment and care were outstanding.
5/ Scanning takes place in Glasgow - the procedure in Edinburgh. Though they are currently in the process of opening a scanning facility in Guildford (very soon).
There is no blackout, this is very new indeed and before they start publishing findings and information they are being very careful about how they are compiled. They are still in the infancy of this procedure, the logistics have yet to get into full swing.
However the EHC are not great at publishing what's happening, that will come with time.
Any specific questions fire away.