The Civil Service has been forced to update its background briefing notes attached to the King’s Speech after former Prime Minister Liz Truss complained it represented a “flagrant breach” and was a “political attack”. Truss, who lost her South West Norfolk seat to Labour with a swing of 26.2 per cent, sent a letter to Cabinet Secretary Simon Case from the Republican National Convention in Millwaukee, Wisconsin. She said: “It has been brought to my attention that the King’s Speech background briefing notes published today and available online contain repeated references personally to me and act…