Sources have been suggesting that a draft Wales Bill to usher in the tax and borrowing powers announced by the Prime Minister last week could contain a 'sunset clause' which would set a deadline for holding a referendum on transferring the power to vary income tax.
The Conservatives, Plaid Cymru and the Liberal Democrats are all keen to see such a referendum held within the next few years, but senior Labour figures such as the First Minister, Finance Minister and Shadow Welsh Secretary have refused to back a vote without the promise of fair funding.
The Silk Commission report said 2017 was the 'earliest' date for holding a referendum but it's now being touted as a likely one. A sunset clause would mean that Assembly politicians would have to agree to trigger a vote by whatever deadline was set or lose the right to do so altogether.
More top news
It'll be a rather cloudy and windy evening and night in most areas with showery outbreaks of rain, some heavy.
Western Power Distribution say almost a thousand homes are without power due to damage caused by Storm Brian.
Helping young people 'earn, learn or serve' is among the policies Plaid Cymru will focus on ahead of the next election.