Try this for size
2012 249d vote.
EGO = 1783mil
Less 30mil ERM share holding
Less 170mil supporters with ERM
Less 170mil 10% swing against
Total 1413
249d support = 794mil
Add 629mil ERM holding
Add 170mil Erm supporters
Add 170mil 10% swing
Add 170mil prepared to vote this time
Total 1933mil
Just a conservative guess.