Perhaps you should avoid details and just stick to paint and pictures.
The Guardian puts the big increase in Labour numbers down to the forming of the coalition in May,
http://www.theguardian.com/politics/2010/may/13/labour-party-record-surge-membership
So when Ed became their Leader, Labour had a membership of 193,000
Now they have a membership of 190,000.
All these figures are in the Appendix to the Library document
I must say that's some spin to claim the membership is rising.
Did you do some work for George Osborne, to convince us we got a 50% discount on the EU increase aswell.