Charles & Camilla on the tube

The Prince of Wales and the Duchess of Cornwall hopped on the tube today to mark the underground's 150th birthday.

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First joint tube trip for Charles and Camilla

Today's journey was the first ever joint tube trip for Prince Charles and the Duchess of Cornwall.

One's got a ticket to ride at Farringdon Station. Credit: Chris Jackson/PA Wire

Although both of them now qualify for an over-60s Freedom Pass, they were presented with commemorative Oyster cards topped up with £10 credit for the one stop journey from Farringdon to King's Cross.

A brand new train was used, which arrived at the platform empty. But members of the public boarded along with the royal couple - separated only by a group of policemen standing further down the carriage.

Charles and Camilla looked relaxed as they rode on the Metropolitan Line. Credit: Chris Jackson/PA Wire

When the royal couple arrived at King's Cross they were taken to "Platform nine and three quarters", a Harry-Potter themed attraction in the station.

In the books by JK Rowling, the "Hogwarts Express" steam train leaves from a secret platform, which witches and wizards reach by pushing a trolley through a wall.

But Charles and Camilla remained firmly in the land of the "muggles" or non-wizards.

Attempting to board the Hogwarts Express, at the fictional Platform nine and three quarters. Credit: Chris Jackson/PA Wire

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