Tuesday newspaper round-up: HS2 trains, renewable energy, Anthropic

(Sharecast News) - Plans to change the size of HS2 trains to maximise capacity are likely to inflate costs and mean fewer seats and slower services north of Birmingham, a senior government and rail industry figure has warned. The £2bn order for 54 high-speed trains, to be built in Britain by a joint venture of Alstom and Hitachi, is under review as HS2 Ltd seeks to cut costs and renegotiate contracts. - Guardian Households will be called on to boost their consumption of Great Britain's record renewable energy this summer to help balance the power grid and lower energy bills. Under the new plans, people could be encouraged to run dishwashers and washing machines or charge up their electric vehicles when there is more wind and solar power than the electricity grid needs. - Guardian

Anthropic has released the first AI model capable of hacking IT networks, an online UK safety watchdog has warned. The Artificial Intelligence Security Institute (AISI), a government-backed research lab, has sounded the alarm over Anthropic's new Claude Mythos model after discovering it can autonomously carry out advanced cyberattacks. After a round of testing on the model, the AISI found that the newly developed AI chatbot can launch "multi-step" attacks that would take a human professional hacker days. - Telegraph

Hundreds of Hollywood stars have come out against Paramount's takeover of Warner Bros, claiming the deal to hand control of the studio to supporters of Donald Trump will hurt democracy. Actors, including Jane Fonda, Glenn Close and Ben Stiller, have signed their names on an open letter expressing "unequivocal opposition" to the tie-up, arguing that competition is "essential for a healthy economy and a healthy democracy". - Telegraph

Mortgage volatility is now greater than after Liz Truss's mini-budget, as lenders pull their products at a record speed. Brokers said that homeowners faced "mayhem" when looking to borrow or lock in a new rate because the average shelf-life of mortgage products had fallen to a record low of eight days. - The Times