Newspaper headlines: Men in court on terror charge and Christine Keeler dies
They report that two men were arrested in raids in London and Birmingham last week and are due in court today.
According to the Times, the plan was to set off an explosion near Downing Street before making an attempt on Theresa May's life.
The state of the Brexit negotiations gets plenty of analysis in Wednesday's newspapers.
The Guardian claims the prime minister is under increasing pressure to secure a breakthrough after Democratic Unionists expressed their shock at how the question of the Irish border was handled.
The paper believes that some Leave supporters are saying the time had come to walk away from negotiations.
The Daily Telegraph says the prime minister is facing a cabinet revolt after Boris Johnson and Michael Gove expressed "genuine fear" that Mrs May was trying to force through a soft Brexit.
Buzzfeed News suggests there could be a "brutal internal row" in the Tory party.
It reports that the pro-Remain faction has become "emboldened," believing that the deadlock over the Irish border has given them a chance to reopen the debate about staying in the single market and customs union.
Most of the papers carry pictures of the former model Christine Keeler, who's died aged 75 and was best known for a sex scandal in the 1960s.
The Daily Telegraph is among those to carry the classic black-and-white shot of her sitting astride a back-to-front-chair, apparently naked, with her chin resting on her hands.
The paper says the woman, whose affair with the war secretary John Profumo contributed to the fall of the Macmillan government "died in relative penury".
The Daily Mail describes her as "achingly beautiful" and says the scandal "defined and ruined her life".
Anger at yesterday's news that rail fares will rise in January is the main story for the i, which says commuters are facing the biggest price hike for five years - an average of 3.4%.
The industry body tells the paper that 97p in every pound goes back into improving services.
The front page of the Metro highlights a quote from one of the transport unions, which says rail users are being "bled dry".
An editorial in the Daily Mirror is scathing - under the caption "train robbers", it says rail passengers are being fleeced by "fat controllers".
If you're planning to buy a child a toy this Christmas, a report in the Daily Telegraph may make you think again.
It looks at American research which found that children with fewer toys were more creative and played with them for longer.
Researchers suggest that parents, schools and nurseries rotate a small number of play items so kids have more chance to use their imaginations.
The article notes that, on average, a child in the UK owns more than 200 toys.
And the Times tells how the humble earthworm could be among the first settlers on Mars or the moon, where they would be used to help grow crops.
It reports that worms have been born in simulated Martian soil for the first time at a laboratory in the Netherlands.
A biologist tells the paper that worms would play a crucial role in establishing a closed but sustainable ecosystem.
The article dubs the creatures "wormonauts".