Here’s a roundup of the key developments from the day: Liz Truss is set to win the Tory leadership contest by a decisive margin next month, according to an exclusive Sky News poll. The foreign secretary has a 32-point lead over her rival, Rishi Sunak, in the poll, which was published today. The gap between the two candidates to replace Boris Johnson has narrowed – Truss had a 38-point lead in the last poll – but the foreign secretary is still set to win by large margin. Future Tory leadership contests should be run faster, a cabinet minister has said, saying he would have been “happy if this whole process was over more quickly”. James Cleverly, a backer of Truss, said it would be right if the two-month process were curtailed in future. Britain’s first double-digit inflation in more than four decades has cast doubts on the plausibility of the tax cuts being promised by Truss and Sunak during their leadership battle, one of the UK’s leading thinktanks has said. Following news that the government’s preferred measure of the cost of living rose by 10.1% in the year to July, the Institute for Fiscal Studies said higher inflation would mean extra spending on welfare benefits, state pensions and on debt interest. Two-thirds of all UK households will be trapped in fuel poverty by January with planned government support leaving even middle-income households struggling to pay their bills, according to research. It shows 18 million families, the equivalent of 45 million people, will be left trying to make ends meet after further predicted rises in the energy price cap in October and January. The leader of the RMT union, Mick Lynch, has suggested unions are on the brink of calling for “synchronised” strikes over widespread anger at how much soaring inflation is outpacing wages. Speaking from a picket line in Euston as railway workers staged another strike in their dispute over pay and conditions, Lynch predicted “a massive response coming from working people”. Margaret Ferrier has pleaded guilty to breaching Covid rules by travelling on a train between Scotland and London after being told to self-isolate in September 2020. In a hearing at Glasgow sheriff court on Thursday, the MP for Rutherglen and Hamilton West admitted that she culpably and recklessly exposed the public to risk of Covid-19 infection. Truss is to be “empty chaired” by farmers after snubbing the rural hustings scheduled for tomorrow. Sunak is due to address members of the National Farmers’ Union tomorrow, but despite pleas from the president of the NFU, Truss has refused to attend. Keir Starmer is facing a potential revolt from union leaders and party members over banning his shadow cabinet from joining picket lines at the Labour party conference next month. Momentum has launched a campaign aimed at persuading Labour’s MPs and leadership into backing striking workers in the run-up to the conference in Liverpool at the end of September. We’ll be closing this liveblog shortly. Thanks so much for joining me. I’ll be back again tomorrow.