Well, the Green Deal saga rumbles on and the plot thickens. My view is that, whilst accredited certification for installers is a good idea, do we have time.
Martin Brown's excellent blog refers to the process at http://fairsnape.wordpress.com/2011/10/09/green-deal-pas-2030-necessary-control-or-unnecessary-burden/ and as someone who advises clients on accredited certification of management systems, will there be enough time to:

• Agree PAS 2030
• UKAS to accredit certificaiton bodies
• Certificaiton bodies to train auditors
• Companies to devise and apply PAS 2030 systems
• Companies to gain accredited certificaiton to PAS2030

I don't want to be a pessimist and want to follow the government line of "let the market decide" as similar state meddled schemes have ended in lots of people spending money to train with out little return, such as with HIPS/DEA, but industry needs clear guidance, especially with so little time to spare.