By Alex Richards FA chiefs want Gareth Southgate to stay on for the next World Cup. England boss Southgate dropped his clearest hint yet that he is ready to remain in charge beyond his contract which expires in December. That would be the music to the ears of the Football Association with the hierarchy unwavering in their belief that he remains the best man for the job. Southgate has already been in charge since 2016 and if he stayed on for the next World Cup that would be 10 years in charge, the longest reign since Sir Alf Ramsey who was in charge from 1963 to 1974. The FA put in an extra six…