Henry VIII refused to continue to hold the truce with Scotland.
This was motivated by the fact that the pro-French Duke of Albany,
who had expelled Henry's sister Margaret Tudor from the Scottish
regency, remained north of the border and free from constraint.
Citation:
Editors. "Henry VIII refuses peace with Scotland while the Duke of Albany remains there".
The Literary Encyclopedia. First published 01 November 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=14288, accessed 18 May 2013.]