Forty years on, France has been urged to come clean. On the anniversary of the Exocet attack on HMS Sheffield that caused the first British fatalities of the Falklands war, the country is under pressure to tell what it did not share with Margaret Thatcher's government.

       Senior MPs today call for an inquiry into claims that France withheld secrets about missiles that killed 46 British sailors.

       The Telegraph has been told that the French-made Exocet guided missiles contained a "kill switch" that could have disarmed them, but that France denied such a device existed.

       Associate editor Gordon Rayner has the full story on the lingering questions about what became perhaps the defining weapon of the conflict. And read The Telegraph View on France's role in the conflict.

       Energy firms accused of overcharging on direct debits

       A Cabinet minister has accused energy companies of overcharging customers on direct debits to shore up their own finances, as millions of households struggle with the cost of living crisis.

       Kwasi Kwarteng, the Business Secretary, announced a clampdown on suppliers following "troubling" reports that some were raising bills "beyond what is required".

       He said that Ofgem, the industry watchdog, had opened an investigation into the market and ordered companies to hand over their data.

       If suppliers are found to have increased customer bills by more than is necessary, they could be hit with fines worth up to 10 per cent of turnover, equal to hundreds of millions of pounds.

       It came as it emerged that households that refuse to install heat pumps could see their properties fall in value under a "root and branch" government review.

       The cost of living crisis will be a key issue in this week's local elections. Amid allegations of an electoral pact, The Telegraph can reveal hundreds of Labour and Liberal Democrat candidates are running unopposed by the other party in dozens of Conservative target councils.

       The Tories accused the two parties of a "stitch-up" in Thursday's elections in 39 council districts. Telegraph analysis of data compiled by Democracy Club found the areas where Labour candidates are running without a Liberal Democrat challenger. And these are the key seats to watch.

       Women's passport photos 'more aggressive' as they age

       Throughout history, older women have often been labelled as hags or crones, as the irreproachable bloom of youth gives way to a timeworn truculence in their countenance.

       Now, scientists have found that the faces of women do indeed appear broader and more aggressive than men's after the age of 48.

       But, as science editor Sarah Knapton explains, the reason is much more intriguing than simple biology.

       Daily dose of Matt

       In his latest cartoon, Matt finds humour in the MP caught watching pornography – and view Blower's latest political cartoon, plus how you can buy one of his Platinum Jubilee jigsaws.

       Also in the news: Today's other headlines

       Pressure to return to normal | Hospital chiefs and university vice-chancellors have been threatened with government action unless they get back to normal after the pandemic, The Telegraph can disclose. Sajid Javid, the Health Secretary, and Michelle Donelan, the universities minister, have respectively told NHS trusts to drop restrictions in hospitals that are limiting operational capacity, and told universities to return to face-to-face teaching. Mr Javid is also threatening to name and shame NHS trusts that do not heed his calls to ease the measures.

       'Beergate' | Police silent over claims against Sir Keir Starmer James Stunt | Ecclestone ex on trial for laundering ￡266million 'Deliveroo culture' | Britain set to become fattest nation in Europe Pictured | Teenager drives wrong way through Blackwall Tunnel Royals | Camilla reveals unlikely hobby ahead of Platinum Jubilee Around the world: Assault on Mariupol steelworks

       Russian forces have launched a huge bombardment and infantry assault against the Mariupol steelworks in which Ukrainian soldiers have resisted attacks for weeks. Ukrainian and Russian sources said the assault was one of the biggest against the Azovstal steelworks, now a besieged fortress for 2,000 Ukrainian soldiers and 1,000 civilians. In Boris Johnson Street in Fontanka, Colin Freeman has our dispatch on how the Prime Minister's speech to Kyiv's parliament was received.

       Comment and analysis Richard Kemp | Vladimir Putin's military cupboard is now bare Philip Johnston | Can PM survive a local election disaster for long? Allison Pearson | Will anyone be backing the Tories this week? Alan Cochrane | Scots' chance to knock wind out of Sturgeon's sails Reader letters | The NHS must spend more on front-line care Editor's choice Simple way to roll back the years | Why brisk walking is the secret to a long life Kim, Marilyn and that dress | Story of the $4m 'happy birthday' frock that stole the show How Venice transformed Monet's art | The artist's passion for the city's light and water Sport briefing: Liverpool's stunning fightback

       Liverpool booked their third Champions League final in five seasons after a chaotic 3-2 second-leg win in Villarreal saw them progress 5-2 on aggregate. Read Jason Burt's match report after the stunning fightback. Meanwhile, Chelsea have been warned their future is on the line after the Government ruled out sale delays amid fears Roman Abramovich is reneging on his promise to write off a ￡1.6？billion debt.

       Business briefing: BP pledges to invest in North Sea

       BP is poised to expand a major Shetland oilfield as it boosts investment in the North Sea to fend off the threat of a windfall tax. Bernard Looney, chief executive, said the FTSE 100 company would "put a real push" under further development as it posted ￡5billion in quarterly profits – its highest in more than a decade – after oil and gas prices surged as Russia's war on Ukraine roils international energy markets.

       Tonight's dinner

       Prawn fideuà | A classic Spanish seafood dish by Claire Thomson that is made using the same principles as paella. See the recipe and try our Cookbook newsletter for more ideas.

       Travel: Five-star hotels for one-star prices

       South-east Asia is the best value place on Earth right now. In 10 years of living and travelling in the region, writer Ronan O'Connell has never seen such incredible deals, with hotels hotly competing for far fewer overseas visitors. See his pick of the best bargains in five different countries where luxury hotel rooms are on offer for ￡45 a night or less.

       And finally... for this morning's downtime

       Finland's nuclear bunkers with room for 4m people | With its brightly coloured slides, trampolines and tunnels, the soft play area at the Hakaniemi Arena looks much like any other. The difference is that it lies 25m below ground in a cavernous space hollowed out of the Precambrian bedrock beneath the city – and is designed to withstand nuclear, biological and chemical attacks. Ed Cumming takes a tour of Helsinki's timely fortification against an attack.

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