"As the Prime Minister [David Cameron] said when addressing the Canadian parliament last year: 'We are two nations, but under one Queen and united by one set of values,'" Hague said in a written statement to CBC News."Great" wars and Anglospheric bullshit, it's all trans-Atlantic Tories trading in other people's blood.
"We have stood shoulder to shoulder from the great wars of the last century to fighting terrorists in Afghanistan and supporting Arab Spring Nations like Libya and Syria. We are first cousins."
Incidently, the back inside cover of your Canadian passport already says Canadians are able to use British missions in the absence of a Canadian one. It doesn't state it, but Canada also has agreements with Australia to similar effect.
Unless this is a return to the days of visa-free right-to-work and shared passports, this is simply an enhancement of existing diplomatic arrangements.