Could Reeves break a 50-year taboo by raising income tax in her Budget?
Watch: BBC quizzes Chancellor Reeves on manifesto promises
It has been called the 50-year tax taboo.
It is more than half a century since a chancellor of the exchequer chose to put up the basic rate of income tax - that was Labour's Denis Healey, who delivered his Budget on 15 April 1975.
Not once since have any of his successors done the same thing.
Five decade
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