Today I received GCMS notes but don't understand they sent my file to London it was before in Islamabad. Last page says Updated date September 2013, and I applied in 2012 September
Have a look here http://www.canadavisa.com/canada-immigration-discussion-board/spousal-immigration-file-transferred-to-london-office-from-islamabad-t171377.0.html
Many files are being transferred to London, most likely due to the backlog in Islamabad.