Who wrote "Successful plan-making"?

Department for Levelling Up, Housing & Communities did not have the information requested.

Dear Department for Communities and Local Government,

Similarly to my earlier request today I would also like to know which person(s) or consultancy wrote "Successful plan-making - Advice for practicioners" available at http://www.pas.gov.uk/c/document_library...

Yours faithfully,

Philip Gibbs