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LONDON, UNITED KINGDOM - JULY 17: The Prince And Princess Of Wales' Passports. The Only Time They Have Been Allowed To Be Photographed. (Photo by Tim Graham Photo Library via Getty Images)

LONDON, UNITED KINGDOM - JULY 17:  The Prince And Princess Of Wales' Passports.  The Only Time They Have Been Allowed To Be Photographed.  (Photo by Tim Graham Photo Library via Getty Images)

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BATH, ENGLAND - OCTOBER 10: In this photo illustration, UK passports are seen on October 10, 2016 in Bath, England. Since the UK voted to leave the European Union in June, the UK's currency has been fluctuating in value against other currencies, including the Euro and the dollar, and looks likely to remain doing so while the uncertainty remains surrounding the terms of the UK's departure from the EU. (Photo by Matt Cardy/Getty Images)

BATH, ENGLAND - OCTOBER 10:  In this photo illustration,  UK passports are seen on October 10, 2016 in Bath, England. Since the UK voted to leave the European Union in June, the UK's currency has been fluctuating in value against other currencies, including the Euro and the dollar, and looks likely to remain doing so while the uncertainty remains surrounding the terms of the UK's departure from the EU.  (Photo by Matt Cardy/Getty Images)

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Old British Passport with New British Passport

Old British Passport with New British Passport