The Telecommunications (Single Emergency Call Number) Regulations 1992
These Regulations implement Council Directive 91/396/EEC (O.J. No. L217, 6.8.91, p.31) and require any public telecommunications operator within the meaning of section 9 of the Telecommunications Act 1984 to provide an emergency call service on the number 112 in addition to the existing 999 service as a condition of their licence.