UK Tax Revenue Chart
Current UK Tax Revenue: 25.35% GDP
UK Tax Revenue for Dec 2015
Mean: 25.09% GDP
Median: 25.26% GDP
Min: 21.07% GDP (Dec 1973)
Max: 27.62% GDP (Dec 1984)

UK tax revenue (percent of GDP). Excludes most social security contributions.

Source: World Bank > UK > UK Tax Revenue