Newspaper headlines: PM 'no quitter' and memories of the 'people's princess'

Theresa May's assertion that she's "not a quitter", and plans instead to lead the Conservatives into the next election, is the lead story for several of the newspapers.

The Guardian says her pledge could "reignite anger" among Tory MPs, who have been led to believe she would stay on only until the end of the Brexit talks.

The paper suggests Mrs May is trying to "stamp her authority" on the party ahead of a number of tough battles in Parliament this autumn.

The Times agrees that having survived the summer without a leadership challenge, an emboldened prime minister is starting to look beyond Brexit.

According to the paper's political editor Francis Elliott, Mrs May is "hanging tough" - and she's not going without a fight.

For the Daily Telegraph, the surprise announcement was a "radical departure" from her previous statements where she said she would only stay for as long as she was wanted.

The paper points out the parallels with Margaret Thatcher, who vowed in 1987 to "go on and on", only to be ousted three years later.

Her strategy of "throwing down the gauntlet to her rivals" could backfire, the paper says, and "reignite plots to challenge her".

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The Financial Times believes the prime minister's comments could prompt an early leadership election.

The Daily Mail reports that her announcement will "shock Westminster" and leave many of her backbenchers "stunned", but in an editorial, the paper says it's time for the party to rally behind her.

The Daily Express agrees that a "defiant" prime minister, who's in it for the long haul, is "precisely what this country needs".

Several papers use photos of Prince William and Prince Harry looking at tributes to their mother outside Kensington Palace - taken 20 years apart

The other story dominating the newspapers is the 20th anniversary of the death of Princess Diana.

On their front pages, both the Sun and the Daily Mail juxtapose photographs of a young Prince William and Prince Harry outside the gates of Kensington Palace in 1997, with pictures of them standing in the same spot on Wednesday.

For the Daily Mirror, their impromptu visit to the Palace gates to look at the tributes to their mother had "heart-rending echoes" of 20 years ago.

A quote from Prince Harry - "all of us lost somebody that day" - is the headline in the Daily Telegraph.

Kezia Dugdale resigned with her "head held high"

The Times reports on the fallout from the resignation of the Scottish Labour leader, Kezia Dugdale, claiming the "Corbynistas are set for a power grab" in the race to replace her.

The Guardian says tensions with the party leadership in London "helped" her decision to quit.

The i newspaper says claims she was hounded out by the hard left are exaggerated and the possibility of her standing down had been talked about for a while.

"Hard slog, negligible progress" is how the Financial Times sums up the third round of Brexit talks between the UK and the EU this week.

The paper says the two sides "danced around the biggest obstacles", making headway on only a handful of issues and deliberately holding back their strongest political cards for a showdown later this year.

The Daily Telegraph reports on the "fury in Brussels" where EU Brexit negotiators were apparently left "flabbergasted" after their British counterparts spent three hours rebutting the EU's demands for a divorce settlement.

Looking ahead to what's expected to be a "frosty" joint news conference later, the paper says the talks are on course for an "acrimonious impasse".

The Financial Times reveals that the NHS is planning to pay recruitment agencies up to £100m to boost the number of GPs in England.

The paper says around half of the 5,000 new doctors promised by Health Secretary Jeremy Hunt will be recruited from overseas.

The agencies will then earn about £20,000 in fees for every GP they hire.