True Wales warns assembly members could completely replace Welsh MPs
A group calling itself 'True Wales' has begun a campaign against further law-making powers for the Welsh assembly.
The group, which claims to have cross-party support, warned more powers would lead eventually to independence.
Tory MP David Davies, who earlier this month announced plans to campaign for a 'No' vote, has backed the new group.
A Welsh Assembly Government pledge to hold a referendum on law-making powers was key to the 'One Wales' coalition deal between Labour and Plaid.
First Minister Rhodri Morgan this week urged Mr Davies to present his views to All Wales Convention, which is measuring public support for more powers, rather than campaign now.
But True Wales spokesman David Rees, a Labour Caerphilly councillor, accused the convention of spending public money on promoting a 'Yes' vote in a referendum.
He said: "The people of Wales are astute enough to know the answer to the question is either 'yes' or 'no'.
"Let's have the referendum as soon as possible, so that taxpayers' money can be spent on vital public services."
Welsh ministers and Convention Chair Sir Emyr Jones Parry have insisted its job is to promote a debate and seek as many views as possible on the question of further powers for Cardiff Bay.
True Wales members chose the name because they believe those wanting Wales to remain a full part of the United Kingdom have been "unfairly categorised as anti-Welsh".
BBC Wales understands the group has around 20 members.