It may have been online for some time already, but I only just saw it and would like to bring it to your attention: the Court's registry has drafted a short information note
on the pilot judgment procedure. For more information on the pilot judgment procedure, see als the recent book 'An Analysis of 'Pilot Judgments' of the European Court of Human Rights and Their Impact at National Level'
and my own article in the Greek Law Journal
, entitled 'The Pilot Judgment Procedure at the European Court of Human Rights: Possibilities and Challenges'