You need to understand the GD system:
- a GD Advisor carries out the 'independent' EPC/assessment and recommends measures that will meet the 'golden rule';
- a GD Provider offers the householder a package of GD measures and the associated finance;
- one or more GD Installers install the chosen GD measures;
- the GDA goes back to generate the 'after' EPC.
The government are designing the GD system so that any commercial combination works - you can become all three (Advisor, Provider, Installer) if you want to and no doubt British Gas and others will do exactly that.
However as I understand it so far, it is only a Provider that can sign a contract with the householder and they will either use Installers as subcontractors or do it in-house. The Provider has some fairly big commitments to make and while arranging the finance is a big one, there's lots more besides - it looks likely that the Provider will need to guarantee the measures for some time and fix them if defective, which is not something most finance companies will want to get involved in. It probably also rules out SMEs becoming a Provider, just because the individual contract risks are too large.
For example this is what the DECC web site says:
If the customer experiences a problem associated with their Green Deal plan, the Green Deal provider will always be the first point of contact. The Green Deal provider will investigate the problem and provide redress if necessary, seeking compensation from their contractors if appropriate.
There are people looking at being a fairly passive Provider for Installers or Advisors who have generated GD business for themselves - so more like the role of a finance company. The one that I have heard is looking at this is the Federation of Master Builders, but this is just hearsay and their website says they want the government to:
Create a 'special delivery finance vehicle' that will enable accredited Green Deal installers to contract directly with consumers who wish to use Green Deal and/or ECO finance to pay for the work.
So that's hardly a commitment to become a Provider.
Watch this space is the message at the moment, I think.