Well, I thank Hefin David for that and I agree with a great deal of what he has said in his analysis of the way that the current system can be manipulated to secure outcomes that the system is not intended to secure. It is certainly why we have introduced changes already in 'Planning Policy Wales' that will reduce the room for renegotiation on affordable housing when that has been entered into between a local authority and a developer. When we see those agreements struck we expect to see those agreements honoured. And 'Planning Policy Wales', as I say, reduces the room for developers to come back to the table and to try to renegotiate. We will publish shortly the national development framework for Wales. That will include further actions that we can take to make sure that our system supports our ambitions for affordable housing to be produced in all parts of Wales, in the places where it is most needed, at volumes that help to meet the demand for affordable housing and do so in a way that illustrates genuine partnership working between local authorities discharging their responsibilities and the developers who they rely upon for those houses to be built.