Paul Maynard is concerned about the protection of modern buildings under the listing system. He points out that there is often uncertainty among local planning authorities regarding when to notify national amenity societies of applications for listed building consent. There are also systemic issues preventing interim protection for buildings while a listing assessment process is ongoing, which can lead to deliberate damage or demolition by owners hoping to redevelop sites. Maynard highlights the 30-year rule as outdated and insufficient in protecting modern architecture that may have historical significance despite its relatively short lifespan. He cites examples such as Sainsbury's branch in Greenwich demolished after only 17 years.