Welsh Secretary David Jones will today exercise his right to sit and speak (though not vote) in the Assembly for its debate on the Queen's Speech, including changes to devolution that involve giving income tax raising powers to the Welsh Government, subject to approval in a referendum.
They'll be limited by the so-called "lockstep", which requires any changes to affect all bands of income tax. It's an issue that's split the Welsh Conservatives. Four Tory AMs were sacked as shadow ministers for abstaining in a vote, although party policy in Cardiff Bay is against the lockstep.
They argued that Conservative AMs shouldn't oppose what the Welsh Secretary is doing at Westminster, even when he's out of line with what they've decided. There will be another vote today, when all Conservatives are due to abstain, rather than embarrass the Welsh Secretary when he's in the Senedd.