Plaid Cymru has published legal advice which it says shows that the Welsh Government's decision not to oppose the UK Government's main Brexit bill will 'weaken' the Assembly's powers in the future.
The party's leader Leanne Wood has written to the First Minister highlighting the advice from the Assembly's own lawyers. She'd earlier accused him of reaching 'a dodgy deal between the Tories in Westminster and your Labour Government.'
In response, Carwyn Jones conceded that the agreement was 'not ideal' but said that it 'safeguarded' the powers of the Assembly.
He's been criticised by Plaid Cymru for dropping his previous opposition to the UK Government's EU Withdrawal Bill which both he and the Scottish First Minister Nicola Sturgeon had described as 'a power grab.'
The Scottish Government continues to oppose the bill.
Leanne Wood quoted the legal advice during First Minister's Questions without initially identifying the source. She asked Carwyn Jones:
In response to that, Carwyn Jones said:
Plaid Cymru claims that was a 'clear mistake' by the First Minister and that he was 'rattled' when Leanne Wood revealed the source of the quotation.
Explaining why she's now written to Carwyn Jones, she said: