Prince Charles and Camilla go Underground: in photos 8 Photos By MSN UK News Chris Jackson/PA Wire 1 of 8 To full screen SHARE TWEET EMAIL The Duchess of Cornwall and Prince Charles on the Underground The Duchess of Cornwall and The Prince of Wales travel on a Metropolitan underground train from Farringdon to King's Cross as they mark 150 years of the London Underground. They also took a tour of King's Cross and St Pancras International stations and a recently renovated hotel as the following photos show. Chris Jackson/PA Wire 2 of 8 To full screen SHARE TWEET EMAIL The royal service The royal couple settle in for the journey. Chris Jackson/PA Wire 3 of 8 To full screen SHARE TWEET EMAIL A smiling Prince Charles The Prince of Wales laughs as he prepares to travel on an underground train to help celebrate the transport network's special birthday. Chris Jackson/PA Wire 4 of 8 To full screen SHARE TWEET EMAIL Passing through a ticket barrier Pictured are Prince Charles and his wife as they walk through a ticket barrier. John Stillwell/PA Wire 5 of 8 To full screen SHARE TWEET EMAIL Royal couple stop at 'Harry Potter platform' A photo showing the royal couple trying to board the Harry Potter inspired Hogwarts Express, at the fictional platform nine-and-three-quarters, during a tour around the refurbished King's Cross train station in London. Oli Scarff/PA Wire 6 of 8 To full screen SHARE TWEET EMAIL Sharing a joke The Prince of Wales shares a joke with Kevin Kelly (centre), general manager of St Pancras Renaissance London Hotel, as they admire the architecture of St Pancras International station. Oli Scarff/PA Wire 7 of 8 To full screen SHARE TWEET EMAIL The royal couple try a Victorian drink The Prince of Wales and the Duchess of Cornwall drink a punch made from a Victorian recipe during a visit to the recently regenerated St Pancras Renaissance London Hotel adjacent to St Pancras International station. Oli Scarff/PA Wire 8 of 8 To full screen SHARE TWEET EMAIL The royal view of a grand staircase Viewing the grand staircase, the Duchess of Cornwall and her husband are pictured with hotel historian Royden Stock at the St Pancras Renaissance London Hotel.