Pressure still on foreign secretary in leadership race as she gains just seven new backers in latest round

• Tory leadership election: full results after round three
• Who’s still standing and what are they promising?

Supporters of Liz Truss have said her key rival, Penny Mordaunt, has “topped out” of backers, as the foreign secretary gained ground in the fight for second place in the Conservative leadership contest.

Mordaunt lost a vote in the latest ballot of Tory MPs – a key sign her campaign had stalled after a weekend of bruising attacks – but remained behind frontrunner Rishi Sunak.

Latest updates: Tory leadership candidates prepare for second TV debate as Monday’s round of voting looms

• When and where to watch the Conservative leadership debates

The expectation of record temperatures will be dominating headlines in the UK over the next couple of days. The chief executive of the College of Paramedics warned on Sky News this morning that the “ferocious heat” could result in people dying.

Tracy Nicholls said: “This isn’t like a lovely hot day where we can put a bit of sunscreen on, go out and enjoy a swim and a meal outside. This is serious heat that could actually, ultimately, end in people’s deaths because it is so ferocious. We’re just not set up for that sort of heat in this country.”

The five candidates face off in a televised Channel 4 debate

• When and where to watch the Conservative leadership debates

Penny Mordaunt also rejected the idea that attacks on her for being too “woke” on issues such as trans rights could be the issue that ends her bid to replace Boris Johnson.

She told Sky News this morning:

Look at how we’re doing in the polls in the country, in London, in Scotland, with young people, with women, with Red Wall, with Blue Wall.

It’s not having an impact on my campaign, and it’s not having an impact on my parliamentary campaign. And I think the reason for that is that people recognise it for what it is.

I think it is important we don’t trash our record, because actually we have done an awful lot of good things.

I care about my colleagues. I have great colleagues and we have to, at the end of this contest, come together as a party.

You can see from my campaign, I’m not engaging in any of that.

I have just been getting on with my job, but I have thought long and hard about what this country needs. I feel really compelled to do this. It would be a huge honour to be prime minister.

Head-to-head sees open arguments over tax and identity politics, with no candidate willing to say Boris Johnson is honest

• Five key takeaways
• Who’s standing and what are they promising?

The Conservative leadership race has exploded into acrimony and recrimination after the first televised debate saw open arguments over tax and identity politics with also none of the five candidates willing to say Boris Johnson is honest.

Coming hours after Liz Truss sought to reinvigorate her faltering campaign with a sudden announcement of new tax cuts costing more than £20bn a year, Rishi Sunak the ex-chancellor, openly ridiculed his former colleague’s plans during the Channel 4 broadcast on Friday evening.