http://www.legislation.gov.uk/uksi/1981/202/madeThe Motor Vehicles (Variation of Speed Limits) (No. 2) Regulations 1980enKing's Printer of Acts of Parliament1981-02-26 The Motor Vehicles (Variation of Speed Limits) (No. 2) Regulations 1980InstrumentThe Motor Vehicles (Variation of Speed Limits) Regulations 1984