25 years ago: An anti-drugs blitz was mounted in Bradford as figures revealed more than one-in-ten registered heroin addicts were living in the Bradford and Leeds area.

25 years ago: The large number of animals involved in Bradford road accidents was described as “disturbing” by an RSPCA inspector at the charity's annual meeting.

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1973: Value Added Tax was introduced in Britain.

1990: The longest prison riot in British history began at Strangeways, Manchester, and lasted until April 25.