Day Tripper - an ode to sexual permissiveness - was the Beatle's first flirtation with social realism, while Hey Jude, Eleanor Rigby, Get Back and Come Together remain complex, serious songs from a seriously important band.

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All it needs is a green paint job, a big number "2" on both sides and you've set up every Thunderbirds fan in the country for a month of restless nights: this pointlessly excessive system definitely makes it the Tracy family's day tripper of choice.

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Start your day early or late so that you miss most of the day-tripper crowds, which peak between 10 am and 4 pm.

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