Canada Post's Royal Wedding Postmark
On April 29, 2011, Prince William, the great-grandson of George VI, was married. Canada Post made available a Royal Wedding postmark featuring Westminster Abbey at over 140 Post Offices so that collectors could have their "collectibles stamped with a special postmark in honour of the Royal Couple's big day." Canada Post announced that the postmark would be available in participating Post Offices between April 29 and July 8.
The Brampton cancellation is shown below:
Royal Wedding First Day Cover : Brampton, Ontario
Se-tenant stamps are from the souvenir sheet.