The Queen's Bentley, Princess Di's Audi and Elton John's Rolls-Royce: Incredible collection of cars that once belonged to royalty (and showbiz royalty) set to sell for over £1million

Two of the Queen's old cars will be put up for sale - with the Mulsanne limousine (shown), built by Bentley in 2012 as a special gift for her Diamond Jubilee tour of Great Britain, expected to attract particular interest. The luxury green motor, which is expected to sell for around £235,000, was fitted with armour protection, reinforced tyres and walnut burr veneered picnic tables as well as waist rails bear the Royal crest. It was the car that took The Queen to her only Cabinet Meeting at 10 Downing Street in 2012. It is part of the collection that will go up for sale next month

The Queen is pictured arriving at Kensington Palace in the Mulsanne limousine in July 2013 after the Duchess of Cambridge gave birth to Prince George. The Royal crest is visible in the interior of the car. It is part of a 12-car collection owned by a private gentleman which also includes Diana's 1994 Audi Cabriolet. It will be put up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13

The Queen's 2001 Daimler Supercharged V8 should sell for around £60,000 at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13. The Queen travelled more than 11,000 miles in the car and it features a number of unique modifications including a factory adapted armrest with a sliding holder specifically designed to hold her particular type of handbag

Princess Diana's 1994 Audi Cabriolet is also part of the 12-car collection. She drove around 4,000 miles in the convertible green sports car. The Audi has been valued at around £50,000 - three times that of David Cameron's old 1972 Fiat 500L, which is also on sale

Princess Diana was often photographed driving Prince William and Prince Harry around in the Audi convertible. Nick Whale, managing director of Silverstone Auctions, said: 'We anticipate a huge amount of interest in these cars from across the globe. These cars have been wonderfully cared for over their lifetimes and we look forward to finding them new homes'

Elton John's 2005 Rolls-Royce Phantom will also go up for sale next month. The imposing, black car is valued at around£155,000. It will go up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13

Sir Elton John and his partner David Furnish arrived in the classic car for their civil partnership ceremony at the Guildhall in Windsor on 21 December 2005. The car boasts a stunning interior and it is valued at around £155,000. Nick Whale, managing director of Silverstone Auctions, said: 'We anticipate a huge amount of interest in these cars from across the globe. These cars have been wonderfully cared for over their lifetimes and we look forward to finding them new homes'

Princess Margaret's 1980 Rolls-Royce Silver Wraith II (pictured) is also going up for sale - complete with a Union Jack. The stylish red convertible is worth between £90,000 and £110,000. Nick Whale, managing director of Silverstone Auctions, said: 'It's an honour for Silverstone Auctions to offer cars with such amazing provenance, cars that belonged to HM The Queen, as well as being owned by some of the most influential personalities of the 20th century'

The 12-car collection, owned by a private gentleman, also includes a 1972 Fiat 500L (pictured), valued at £22,000, which David Cameron once bought as a birthday present for his wife Samantha. It will be put up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13

The former prime minister is understood to have bought the Fiat for his wife Samantha as a birthday present, the couple are pictured here outside Number 10 Downing Street. In Mat 2016 it was also reported that Mr Cameron has bought a £1,500 used Nissan Micra as a 'cheap run-around' for his wife

Michael Winner's 1976 Bentley T1 (pictured) is also going up for sale. The stylish silver car is worth between £40,000 and £50,000. It will be put up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13

A 1970 Wood & Pickett Mini Cooper S Mk II formerly belonging to John Hammell - who worked for Paul McCartney. It will be put up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13

This 1984 Rolls-Royce Corniche convertible was owned by the Qatari royal family. It is worth around £120,000. Nick Whale, managing director of Silverstone Auctions, said: 'We anticipate a huge amount of interest in these cars from across the globe. These cars have been wonderfully cared for over their lifetimes and we look forward to finding them new homes'

This 1973 Rolls-Royce Corniche convertible is also up for sale. It is worth around £110,000. It will go up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13. Nick Whale, managing director of Silverstone Auctions, said: 'We anticipate a huge amount of interest in these cars from across the globe. These cars have been wonderfully cared for over their lifetimes and we look forward to finding them new homes'

This 'armoured' 1988 Mercedes-Benz 560 SEL was formerly owned by King Hussein and Queen Noor of Jordan. It is worth between £25,000 and £30,000. The car will go up for sale at the Silverstone Auctions' Classic Motor Show Sale at Birmingham's National Exhibition Centre on November 12 and 13

King Hussein and Queen Noor of Jordan (pictured) were the former owners of the 'armoured' 1988 Mercedes-Benz 560 SEL. The couple boasted an incredible collection of cars during his reign