Prince Philip's trusty eco-taxi has gone on display at Sandringham.

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. Pictured is a 1900 Daimler Mail Phaeton. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. Pictured is a 1900 Daimler Mail Phaeton. Picture: Ian Burt (Image: Archant 2017)

It's the latest addition to a collection of vehicles used by members off the Royal Family in the museum at their Norfolk retreat.

The 95-year-old Duke of Edinburgh used the gas-powered Metrocab to travel to engagements around London unnoticed for nearly 20 years.

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. Pictured is a 1900 Daimler Mail Phaeton. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. Pictured is a 1900 Daimler Mail Phaeton. Picture: Ian Burt (Image: Archant 2017)

Shortly before the vehicle was delivered, the Queen and her husband were taken for a spin in a converted environmentally-friendly gas-powered taxi.

Sandringham Museum has now re-opened for the summer season. Other exhbits range from the 1939 Merryweather fire engine which once protected the Royal household, to gifts of all kinds given to the Queen on state visits abroad.

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. Pictured is a 1900 Daimler Mail Phaeton. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. Pictured is a 1900 Daimler Mail Phaeton. Picture: Ian Burt (Image: Archant 2017)

It is housed in the former coach houses and stable block which, over the years have also been used as police post, fire brigade station, carving school and Royal garages.

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian Burt (Image: Archant 2017)

Eastern Daily Press: The Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian BurtThe Museum at Sandringham holds an extraordinary collection of Royal memorabilia. His Royal Highness The Duke of Edinburgh took delivery of this London taxi in 1999. Picture: Ian Burt (Image: Archant 2017)