The Planning Advisory Service website includes allsorts of useful information regarding plan preparation and Sustainability Appraisal. It also hosts the Department of Communities andLocalGovernmentPlan Making Manual. See www.pas.gov.uk
The Local Government Group and Planning Advisory Service have produced a guide forcouncillors on neighbourhood planning See www.pas.gov.uk/pas/aio/1256514
Levett–Theriveland URS Scott Wilson have prepared useful guidance on how to go about Sustainability Appraisal of Neighbourhood Plans. See www.levett-therivel.co.uk/DIYSA.pdf
ThePlanning Portal has lots of information on the planning system and is easy to use. See www.planningportal.gov.uk