In the UK, administrative regulations are called Statutory Instruments (SIs). They are referred to as delegated, or subordinate, legislation.
The official print source, Statutory Instruments, is not owned by the Law Library. Instead, the researcher should check the commercially-produced Halsbury's Laws of England (KD310 .H34) with coverage from 1973 or, for more recent SIs, Her Majesty's Stationary Office.
Full-text of all published statutory instruments is available here dating from 1987 and it is keyword- searchable. This site also contains the text of draft statutory instruments from 1997.