In fact there has never been a “Poll Tax” in the UK.
A Poll Tax is one which links payment (and sometimes prompt payment) with the right to vote. The Community Charge introduced by the Conservative government in 1990 and which replaced domestic rates made no such stipulation. The reason it attracted the name was because individuals who were asked to pay were identified, among many other methods, by their inclusion on the Electoral Register. In countries where a Poll Tax has been applied there has been an explicit link between payment of the tax and the right to vote. However, refusal to pay the Community Charge or becoming in arrears with its payment did not deny one the right to vote, so the nickname was a misnomer.
It was rapidly applied by factions opposed to its introduction because they wrongly (or perhaps conveniently) believed that the Electoral Register was the sole source of data for those obliged to pay. They were opposed to its introduction because, they said, its application did not take account of the ability to pay. This was despite the fact that adequate safeguards existed for those on low incomes or benefits.
Unlike, of course, the previous domestic rates system and the current Council Tax system which simply assumes that if you live in a large house you have loads of money.