OPPOSITION politicians have blasted Labour and Plaid Cymru after a co-operation agreement between the two parties collapsed.

The agreement, which involved Plaid agreeing to support the Welsh Government in return for some of its priorities being brought into the legislative programme, was signed after last year's Assembly Election, which left Labour two seats short of a majority with 29 AMs.

But on Friday Plaid leader Leanne Wood announced the deal was being scrapped, saying the party could not support a Labour government which refused not to scrap the planned M4 black route while increasing tuition fees and maintaining the public sector pay cap.

The announcement came after Plaid announced it had signed an agreement to support the Welsh Government's budget for the next two years - which will be maintained despite the collapse of the co-operation deal.

Reacting to the news, leader of the Welsh Conservatives Andrew RT Davies said: "This is yet more chaos from Plaid Cymru.

"By continuing to support Welsh Labour’s budget in the absence of an agreement shows Plaid’s support has never been cheaper.

"On Tuesday they were gleefully propping up Labour, and yet today they expect the public to believe they are an aggressive opposition.

"People across Wales will see straight through this duplicity.

"Welsh Conservatives will continue to provide real opposition to the tired and failing Labour government."

Meanwhile leader of the Assembly's Ukip group and former Conservative MP Neil Hamilton has called for a vote of no confidence in the Welsh Government.

"The question now is whether Plaid will stand up and prove they are a real opposition by joining Ukip and the other parties in a vote of no confidence in this abysmal Labour government, which has reduced Wales to being the poorest part of the United Kingdom."

Although Labour remains two seats short of majority, sole Liberal Democrat AM Kirsty Williams was brought into the cabinet as education secretary following last year's Assembly Election, and is therefore bound by collective responsibility, and earlier this year Dafydd Elis-Thomas left Plaid to sit as an independent AM, saying he would support the Labour administration. As a result, Labour has the votes it needs to pass bills, assuming all its AMs, along with Ms Williams and Lord Elis-Thomas, take part in a vote.