The "Duty to Cooperate" was a legal requirement under the Localism Act 2011, requiring that local planning authorities engage constructively on cross-boundary strategic matters. This legal duty was officially removed on 25 March 2026 but remains part of the tests of soundness which will be considered through the examination process.
Previously, plan-making bodies were legally obligated to engage constructively, actively, and on an ongoing basis when preparing Local Plans to address spatial issues like housing distribution, transport, and major infrastructure. Instead of a rigid legal test that frequently caused local plan failures at examination, the focus has now shifted to assessing how effectively authorities collaborate with each other on strategic matters. The council will continue to work closely with our neighbouring authorities on strategic matters to ensure we align our policy work.