Margaret Thatcher failed to register for the poll tax and was threatened with a penalty fine after introducing the deeply divisive policy.
Westminster council sent a reminder notice to Downing Street and threatened financial penalties if Thatcher and her husband Denis did not return their form.
The community charge, a precursor to council tax, replaced local rates based on property values with a flat-rate payment, meaning that poor households paid the same amount as wealthy ones.
When the levy was introduced, first in Scotland in 1989 and a year later in England and Wales, it caused mass protest and boycotts. The policy, which was abolished in 1993, would prove instrumental in Thatcher’s political downfall.
She returned the paperwork upon receiving the reminder. Millions refused to
