It is due to be a busy summer at Southampton ahead of their Premier League return and not every player from last season will be along for the ride. Russell Martin knows he needs additions in order for his Southampton side to compete in the top flight and work has already begun to strengthen the squad. Taylor Harwood-Bellis’ loan deal was officially made permanent on Monday, whilst Adam Lallana and Charlie Taylor have both joined for free to add vital Premier League experience. READ MORE: Will Smallbone and Nathan Tella react as Taylor Harwood-Bellis confirms Southampton stayNow, Southampton ar…