In an attempt to bring religious unity to his two kingdoms Charles I insisted that the English Book of Common Prayer be adopted by the Scottish Kirk. The Calvinist and Presbyterian Church of Scotland was intensely opposed to this. It provoked riots and prompted the formation of a National Covenant.
Editors. "Book of Common Prayer prescribed for Church of Scotland". The Literary Encyclopedia. First published 01 February 2010
[http://www.litencyc.com/php/stopics.php?rec=true&UID=2178, accessed 25 September 2016.]