In practice, many local authorities have found Local Development Frameworks difficult to implement. Although progress on Local Development Frameworks was made in the years 2012–2015, an assessment by [[Nathaniel Lichfield and Partners]] has found any progress to be "marginal".<ref>{{cite web|url=http://www.kslaw.co.uk/site/library/kslaw_legal_news/why-are-local-development-frameworks-so-important|title=Why Are Local Development Frameworks So Important? - Kingsley Smith Solicitors|publisher=}}</ref><ref>{{cite web|url=https://blog.planningportal.co.uk/2015/04/09/local-plan-progress-marginal-claims-report/|title=Local plan progress ‘marginal’ claims report|first=Planning Portal Content|last=Team|date=9 April 2015|publisher=}}</ref>
