Mr Williams, who is the leader of the local Plaid Cymru Group, a member of Pembrokeshire's National Park Authority and Chairman of its Development Management Committee, has suggested that the local authority should actively pursue a policy of compulsory purchasing second homes, claiming "this crisis needs that sort of action".

BBC: Election 2010: Second homes in Preseli Pembrokeshire

It will also address how ESD can help move Sustainable Development policy and action forward to meet different global, regional, national, and local needs.

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The report - an annual report on the local authority's allotment policy - will be considered by next week's planning, environment and development committee.

BBC: Allotment holders to be surveyed on mental health

The revised national planning policy framework will guide councils in both drawing up their "local plans", which set out their development policies.

BBC: UK Politics