Although the retailer can appeal if a decision is made against them, members of the public do not have a third party right of appeal against a decision approving a supermarket.
The Council should have made the decision in favour of the retailer based on sound planning reasons as set down in local and national planning guidance. If you feel this has not been the case, you should say so
If the application is controversial, conflicts with the development plan, or is a paritcularly large development, there may be a case for it to be considered by the Secretary of State. You can write asking for the application to be “called-in” by the Secretary of State for Communities and Local Government, the Government minister responsible for planning.
To ask for an application to be called-in, you should write both to the Secretary of State and to your regional Government Office (e.g. London Government Office, Government Office for the North West) asking them to refer the application to the Secretary of State. If the Secretary of State does call in the application, there will be a Public Inquiry. A Planning Inspector will report to the Secretary of State, whose office will make the final decision on the application
Councillors or local MPs may want to write to the Secretary of State and Government Office asking for a call-in, as well.
There may be a case for a judicial review if you feel that the Council has acted unlawfully in approving the application. This procedure is a form of Court proceedings and can be used when there is no further right of appeal. Under a judicial review, a judge would review the legality of the decision. The judge would consider only its legality, not its merit, and would be more concerned with the processes through which the decision was made rather than the decision itself. For more information on judicial reviews, please see this Friends of the Earth briefing.