Poor woman--she's already been moved once*:
http://news.bbc.co.uk/2/hi/uk_news/scotland/south_of_scotland/7666291.stm And really, does it count as repatriation if her son *wanted* her buried in Westminster Abbey?
*I haven't been to most of the important historical sites in England**, but I have been to Peterborough. At which place I apparently insulted someone by answering her question: "I can never keep all the Marys straight. This is Bloody Mary, right?" If you didn't actually want to know, why ask?
**Such as the National Gallery, which is having a very cool exhibit on Renaissance portraiture:
http://www.nationalgallery.org.uk/exhibitions/renaissancefaces/default.htm (Why am I so footnote-happy today?)