Nigel Farage has successfully exploited the Commons recess to “grab the mic” and “dominate” the agenda, Harriet Harman has said.

Speaking on Sky News’ Electoral Dysfunction podcast, the Labour peer said that the Reform UK leader has been able to “get his voice heard” while government was not in “full swing”.

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Mr Farage used a speech this week to set himself, rather than Kemi Badenoch’s Tories, up as the main opposition to Sir Keir Starmer at the next election.

The prime minister responded on Thursday with a speech attacking the Clacton MP.

Baroness Harman said: “It’s slightly different between opposition and government because in government, the ministers have to be there the whole time.

“They’ve got to be putting legislation through and they kind of hold the mic.

“They can dominate the news media with the announcements they’re making and with the bills they’re introducing, and it’s quite hard for the opposition to get a hearing whilst the government is in full swing.

“What we used to do when we were in opposition before 1997 is that as soon as there was a bank holiday and the House was not sitting, as soon as the half-term or the summer recess, we would be on an absolute war footing and dominate the airwaves because that was our opportunity.

“And I think that’s a bit of what Farage has done this week,” Harman added.

“Basically, Farage can dominate the media agenda.”

She went on: “He’s kind of stepped forward, and he’s using this moment of the House not sitting in order to actually get his voice heard.

“It’s sensible for the opposition to take the opportunity of when the House is not sitting to kind of grab the mic and that is what Nigel Farage has done.”

But Baroness Harman said it “doesn’t seem to be what Kemi Badenoch’s doing”.

She explained that the embattled leader “doesn’t seem to be grabbing the mic like Nigel Farage has” during recess, and added that “there’s greater opportunity for the opposition”.