Image copyright Getty Images Image caption Leanne Wood's Plaid Cymru group in the assembly agreed a budget deal with Labour earlier this month

Plaid Cymru struck a budget deal with Labour in order to avoid a "constitutional crisis", party leader Leanne Wood has said.

But Ms Wood said Plaid's support was "not in the bag" for future budgets.

She was criticised by the Conservatives for "propping up Labour" after her party said it obtained £119m of extra cash for policies it supported.

The Labour-led Welsh government needs the support of another party to approve its spending plans for 2017-18.

It does not have a majority in the assembly.

Speaking to The Wales Report on BBC One, the Plaid leader said: "I wonder whether people at this point want a constitutional crisis in the assembly where the government can't get its budget through.

"We're trying to be a responsible opposition. We've managed to secure the biggest deal of any opposition party since the beginning of devolution."

'Up for grabs'

Ms Wood said her party got a "good deal" for people across Wales in the budget but still provided opposition to Labour, "particularly on the issue of Brexit".

"There's no guarantee that our votes will be in the bag for the next budget round," she added.

"That has to be earned and worked towards and that's all up for grabs in the future."

Labour ministers struck a deal with Plaid Cymru to ensure the budget would pass the Senedd.

The agreement included a promise of £30m extra funding for higher and further education and £5m to boost the Welsh language.