Medical received at london date can be determined through courier tracking.
MI1:- The first set of Ministerial Instructions (MI1), were announced as part of CIC's Action Plan for Faster Immigration on November 28, 2008,
MI2:- MI2 was second set of ministerial instructions issued on June 26, 2010 and introduced a number of changes to the processing of FSW applications, including a revised list of eligible occupations (29 instead of 38); an annual cap of 20,000 on the total number of new applications to be considered for processing in the FSW class per year, with no more than 1,000 applications in any one of the 29 occupations.
http://www.cic.gc.ca/english/department/mi/index.asp