Keir Starmer with Barbados prime minister Mia Mottley and Simon Stiell, United Nations climate chief, at the COP29 climate summit.Keir Starmer has slapped down a former Labour adviser who said the government should put farms out of business.John McTernan, who worked in No10 when Tony Blair was prime minister, said “we can do to them what Margaret Thatcher did to the miners”.He was responding to reports that farmers are set to protest at changes to inheritance tax rules announced by Rachel Reeves in the Budget.They mean that farms worth more than £1 million could become liable to the tax when their owners die.McTernan told GB News: “If farmers want to go on the streets, we can do to them what Margaret Thatcher did to the miners.”Presenter Patrick Christys said: “So just to