However in an interview with the Total Politics magazine Plaid Cymru's Chief Executive says something slightly different:
one of the points within the One Wales Agreement is the establishment of the All Wales Convention, which has just started work, and then having a referendum on its conclusions before 2011.
What Gwenllian is saying is that if the Convention comes to the conclusion that the Assembly needs more powers than the Act currently offers, (over policing for example), or a different constitution to the present set up (more members, a different voting system etc) then THAT is what the referendum will be about.
If Gwenllian's interpretation is right then I would be much more supportive of the Convention and more enthusiastic about the referendum. If I am right then I think that the Convention and the referendum are a waste of time effort and money.
Is Gwenllian right or is this another example of Plaid over exaggerating what it can get from its pact with Labour in order to please its supporters, in the same way that it promised a daily paper but was only able to deliver a web page?