The previous peak was in 2008 before the Great Recession. Under the Conservative/Liberal Democrat coalition Tax Freedom Day stayed relatively stable, increasing slightly at the end of the Parliament.
Since 2015, the total tax burden (as a share of net national income) has increased with Tax Freedom Day creeping into June. Since 1995, the trend has been for parties of all stripes to increase the total tax burden.
Less reliable data going back over the past 40 years finds that tax burdens tend to fall under Conservative governments and rise under Labour governments. Recent data revisions are unlikely to have shifted this trend, but we can’t say for certain.
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