The Government today published its Brexit Repeal Bill, but within minutes Scottish first minister Nicola Sturgeon warned that she would try to block it.
In a joint statement the Scottish and Welsh governments said they cannot recommend that legislative consent is given to the Brexit Repeal Bill as it stands.
First ministers Nicola Sturgeon and Carwyn Jones described the European Union (Withdrawal) Bill as a "naked power-grab" that undermined the principles of devolution.<
UK Scottish Secretary David Mundell countered that the legislation would result in a powers "bonanza" for Holyrood and said he was confident that legislative consent would be forthcoming.
In their statement, Ms Sturgeon and Mr Jones said:
Experts suggest the Scottish parliament and Welsh assembly do not have the power to block Brexit, but say that refusing legislative consent would be politically embarrassing.