Britain's Queen Elizabeth (C) cuts a ribbon at the opening of the British Garden in Hanover Square in New York, July 6, 2010.[Agencies]

Britain's Queen Elizabeth walks with U.N. Secretary-General Ban Ki-moon (L) at the United Nations Headquarters in New York, July 6, 2010.[Agencies]

The Daily News tabloid published tips on etiquette, instructing readers not to bow if they meet the queen, since they are not subjects, but neither to try offering her a New York-style "fistbump or high-five."

Readers were also advised to steer clear in conversation from mentions of Sarah Ferguson, the former wife of Prince Andrew who was caught attempting to sell access to her ex-husband in a media sting in May, then admitting that she was suffering from money and drink problems.

"Chat instead about dogs and horses; the queen likes them," the News suggested.

Commuter freesheet AM New York, meanwhile, warned the monarch might not like New York's fierce temperatures. "God Save the Queen (and us!)" the front page joked. "Her Majesty visits Baked Apple."

The royal couple's Canada trip took them to a horse race, a visit to the factory making BlackBerry smart phones and Canada Day celebrations.

There was drama on Monday when a power outage plunged Toronto into chaos just ahead of a state dinner. Thousands of people were stranded in office buildings or stuck on roads snarled by the sudden absence of traffic lights.

The British head of state's tour comes at a time when Buckingham Palace is feeling some of the same budget crunch pressuring the rest of the country.

Britain's finance minister George Osborne announced a shake-up in royal funding in June.

He also said that the 7.9 million pounds (9.5 million euros, 11.6 million dollars) royal operating budget will remain frozen, as it has been for the last 20 years, despite media reports that royal officials are requesting an increase.