http://www.legislation.gov.uk/uksi/2010/284/signature/madeThe M6 Motorway (Junctions 8 to 10A) (Actively Managed Hard Shoulder and Variable Speed Limits) Regulations 2010Speed limitsenKing's Printer of Acts of Parliament2015-07-01ROAD TRAFFICSPECIAL ROADSThese Regulations introduce variable speed limits to the M6 Motorway from junctions 8 to 10A and on associated slip roads and linking carriageways.Signed by the authority of the Secretary of State for TransportC. D. MoleParliamentary Under Secretary of StateDepartment for Transport7th February 2010