A National Planning Practice Guidance (PPG) leaves open the question of what can be dealt with as a non-material amendment, suggesting that context is pivotal. This allows planning authorities discretion to consider site-specific circumstances. Also, although the PPG advises that consultation is unlikely to be needed in such a case, it does indicate that it is possible to carry it out. So I cannot give a definitive answer as to whether to accept a non-material amendment application, but advise you to make your own decision. If you decide it could be made, you could then consult the neighbours. Given the fallback right to insert the roof light once the development is completed, I would not recommend refusing a non-material amendment application or a planning application unless serious harm would result. John Harrison
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