A lot of comment has been generated about NP from different stakeholders. Here we point you to some of the best and  most pertinent of these.
Short commentaries from academics:
Briefings
Other sources
Parker, G. and Wargent, M. (2017) ‘Participant Experience of Neighbourhood Planning in England’, Working Papers in Real Estate & Planning 01/17, University of Reading http://centaur.reading.ac.uk/70018/1/wp0117.pdf
Practitioners 
Many organisations involved in the delivery of Neighbourhood Planning produce frequent updates on policy and emerging practice. These include:
Note: Material will be ADDED HERE periodically