This week marks the 50th anniversary of the last public performance of The Beatles – the band whose legacy lives on, not least in the world of tax.

Many will know the HMRC karaoke favourite The Taxman ('There's one for you, nineteen for me...'), George Harrison's furious response to being hit with a super-tax by the Harold Wilson government.

Less well-known is the ‘Beatles clause’ - a targeted anti-avoidance rule aimed at preventing entertainers from converting highly taxed income to lower-tax capital receipts - a measure which remains on the statute book to this day.

Yet half a century after the band left the stage, the tax issues they raised are as relevant as ever amid a growing international clamour for new super-taxes.