The decision must be taken in accordance with the development plan, unless there are material considerations that indicate otherwise.
In addition, the National Planning Policy Framework represents up-to-date government planning policy and is a material consideration that must be taken into account where it is relevant to a planning application or appeal. This includes the presumption in favour of development found at paragraph 14 of the National Planning Policy Framework.
A material planning consideration is one which is relevant to making the planning decision in question (e.g. whether to grant or refuse an application for planning permission).
The scope of what can constitute a material consideration is very wide. However, in general planning is concerned with land use in the public interest, so that the protection of purely private interests such as the impact of a development on the value of a neighbouring property or loss of private rights to light could not be material considerations.