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The BBC understands that Downing Street accepts Powell's apology and her explanation that her comments did not reflect her views on the issue.

But Downing Street is desperate to show that despite its unpopularity in the polls and grisly performance in real elections, there are signs of progress.

The Labour Party has had a complicated relationship with Sir Tony and his legacy since he left Downing Street in 2007.

The Tories - who have joined Reform UK in opposing net zero emissions by 2050 - urged Labour to end the "mad dash" to this goal - but Downing Street said it would not be changing course.

Downing Street agreed, describing their words as "half-hearted" and "completely unacceptable".