The Scrap Metal Dealer Act 2013 requires dealers and mobile collectors to purchase a licence from the Local Authority, and to keep records detailing where scrap metal they handle is sourced from. Costs vary from Authority to Authority. As regards enforcement, this would largely lie with the Local Authority. Police would probably become involved where theft is suspected or during a traffic stop on mobile collectors.
Both Local Authorities and Police Forces are running with reduced budgets - the Police budget reduction in 2018 stood at 19% compared to 2010.
The primary target of any petition would need to be Local Authorities, rather than the Police.