Nick Timothy's comments follow an announcement from the prime minister that some prisoners serving indefinite sentences could be freed to increase prison capacity.
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US and Iran trade strikes for first time in weeks
The attack on Larak Island in the Strait of Hormuz - the first known US strike since late July - has killed two people and injured two others.
UK raises case of British activist detained by settlers in West Bank with Israel
Finn Joughin, a 22-year-old student activist, was arrested in the Palestinian village of Umm Al-Kheir.
One dead and several missing after 'terrifying' flash flooding hits Grand Canyon
"It was a beautiful day - and then people were screaming," one hiker tells the BBC, as 15 people are missing.
Grandfather dies months after confronting burglars
Gordon Nicholass, 85, was the victim of a burglary at his home, say Lancashire Police.
The transfers to watch before window closes
BBC Sport's football experts picks out the standout transfers that could go through before Tuesday's 23:00 BST English deadline.
Venus Williams loses 15th match in row in 2am finish
Venus Williams has not won a singles match in more than a year but has received numerous wildcards to compete. The reasons why go beyond just tennis.
'Moonies' church leader jailed for two years over bribery offences
Han Hak-ja, 83, gave South Korea's former first lady two Chanel bags and a diamond necklace, a court found.
Djokovic in tears during US Open first-round exit
An emotional Novak Djokovic suffers a US Open first-round defeat which provides further evidence that age is catching up with the 39-year-old great.
Djokovic in tears during US Open first-round exit
An emotional Novak Djokovic suffers a US Open first-round defeat which provides further evidence that age is catching up with the 39-year-old great.
The millennials swapping doom-scrolling for gardening
Young people say gardening offers joy, serenity and a sense of community.
'It's not a good relationship, it's a deal for money' - Emery on Villa-Chelsea moves
Unai Emery insists that there are no "good relations" between Chelsea and Aston Villa after a series of transfers between the clubs.
Hints of fiery finale for last ever episode of River City
The Scottish soap opera, based in the fictional Glasgow district of Shieldinch, is coming to an end after 24 years.
Robinson's rhythmical action reminiscent of McGrath - Agnew
Glenn McGrath-like Ollie Robinson has Australia to thank for bringing back into fashion an age-old tactic which is fuelling his success.
Russian strikes destroy 12 million books ahead of Ukraine's first week back at school
Ukraine says Russia is deliberately attacking its culture, after strikes on publishers and churches.
The Papers: 'Killers blocked from early release' and 'Harry should fund security'
Monday's papers are dominated by changes to the government's early release scheme for prisoners in England and Wales.
Parents of seriously ill children should get paid leave, says commissioner
Children's commissioner Dame Rachel de Souza has backed called for more support for parents and carers.
Eight killed and 18 missing after ferry capsizes off northern Cyprus
A search and rescue operation is under way after a ferry carrying nearly 270 people turns over after leaving port.
Eight killed and 18 missing after ferry capsizes off northern Cyprus
A search and rescue operation is under way after a ferry carrying nearly 270 people turns over after leaving port.
Patel to be replaced by Tugendhat as shadow foreign secretary
Kemi Badenoch is expected to carry out a wider reshuffle of her front bench team following high-profile departures.
Emergency measures needed to stop teachers quitting, say Lib Dems
A survey by the party suggested almost half of teachers reported considering quitting the classroom in the next five years.