Rishi Sunak wanted to hatch a “secret deal” with Dominic Cummings to defeat Labour at the next general election, the ex-Vote Leave campaigner has claimed. Cummings, 52, urged the Prime Minister to abandon his cautious economic approach, hold an emergency budget, settle the NHS strikes and double the threshold at which people pay the 40p rate of income tax to £100,000. The former Brexit campaigner also advocated leaving the European Convention on Human Rights, The Sunday Times has claimed. The ECHR has been identified as a significant legal barrier to Britain dealing with illegal Channel crossi…