He misses the referendum debate of 2011.
https://publications.parliament.uk/pa/cm201011/cmhansrd/cm111024/debtext/111024-0002.htm
There had been a petition signed by over 100,000 people calling for one.
David Cameron instructed his MPs to vote against holding one and the first time, the referendum was voted down, but petitions and debates kept coming.
The UK Independence Party started growing and became a threat.
Conservative Councillors were defecting.
Suzanne Evans being one of the more famous examples.
The spectre of a large chunk of Conservative MPs defecting was something he definitely did not want and committed to a referendum.
In the 2014 EU election he stated Labour and the Lib Dems won't, UKIP can't, the Conservatives will.
The defections of Douglas Carswell and Mark Reckless occurred later that year after he had already committed himself by manifesto to holding such a referendum and no more MPs or MEPs followed.
But Ed Miliband, he really dropped the ball in 2014, and it cost him in 2015.
There were 4,376,635 UKIP voters in 2014, whose votes Ed needed to tap into in 2015.
In 2015
11,299,609 voted Conservative
9,347,273 voted Labour
3,881,099 voted UKIP.
Some of those UKIP voters had switched to the Tories, but most did not.
Ever considered that it was because they wanted a referendum without voting Tory ?
Ever considered that IF Ed Miliband had backed the referendum, he could have got an extra 3 million votes ?
At 12.3 million votes, Ed would have been PM.