Manchester Mayor Andy Burnham is being touted as a leading contender to replace Sir Keir Starmer if he resigns as Prime Minister . Mr Burnham has previously indicated he would be willing to overthrow the current Labour leader. At last year’s Labour Party conference, he called for a “debate on our direction”, and in November, he refused to rule out a leadership bid, telling BBC Breakfast: “I don’t know what the future will hold.” However, as the current mayor of Manchester without a seat in Parliament, Mr Burnham faces a potentially arduous route to the top. These are the steps he would have to take before becoming the UK’s next prime minister. Vacant seat Firstly, a vacant parliamentary seat would need to be available and finding one may not be an easy task. There are two by-elections coming up in Scotland, after both SNP Westminster leader Stephen Flynn (Aberdeen South) and SNP MP Stephen Gethins (Arbroath and Broughty Ferry) were elected to Holyrood.…