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My guesses were not that bad, see here: https://en.wikipedia.org/wiki/Income_in_the_United_Kingdom , the section called "Percentile points for income of individuals before tax".

Top 10% is £50k p.a.
Top 5% is £68.5k p.a.
Top 1% is £156k p.a.

So, the top 1%, paying 24% of tax starts to make more sense. Not being funny, but £156k is not a huge amount. There are getting on for 250,000 people earning that, according to a rough reworking of the preceding table in the Wikipedia article.

People drop that kind of cash on a night out.