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The force thanked well-wishers and added: "While PC Miller's prognosis has improved, he remains in hospital in a critical condition."

After the airport greeting, the King and Queen travelled to Lansdowne Park in central Ottawa, where they met well-wishers, local community groups, farmers, and vendors.

She thanked her legal team, friends and family for their "guidance and support", along with the public and "many well-wishers".

The popemobile is one of a number of specially converted vehicles allowing the pontiff to greet huge crowds of well-wishers during official visits.

Loudspeakers blaring out church songs competed with the cheers of thousands of well-wishers - some of whom were dressed in the church's blue-and-white uniforms, while others sported their Sunday best.