UK value added tax (VAT), was introduced at what standard rate in April 1973?

In the United Kingdom, the value-added tax (or value added tax, VAT) was introduced in 1973, replacing Purchase Tax, and is the third-largest source of government revenue, after income tax and National Insurance. It is administered and collected by HM Revenue and Customs, primarily through the Value Added Tax Act 1994.

VAT is levied on most goods and services provided by registered businesses in the UK and some goods and services imported from outside the UK. The default VAT rate is the standard rate, 20% since 4 January 2011. Some goods and services are subject to VAT at a reduced rate of 5% (such as domestic fuel) or 0% (such as most food and children's clothing). Others are exempt from VAT or outside the system altogether.

On 1 January 1973 the UK joined the European Economic Community and as a consequence Purchase Tax was replaced by Value Added Tax on 1 April 1973. The Conservative Chancellor Lord Barber set a single VAT rate (10%) on most goods and services.