With the title of Welsh area champion, Sangoe began drawing in bigger fighters, but these proved a level too far. He travelled to Glasgow to face Dave Mooney, but lost on points. He then faced the two most notable fighters of his career to date. First he faced British Light-heavyweight champion Randy Turpin at the Football Ground in Oswestry. Turpin, though heading towards the end of his boxing career, was too classy for Sangoe and downed him in the third and then twice in the fourth before the referee intervened.Jones (2007) p.53 After the Turpin fight, Sangoe took a five-month break before lining up against Chic Calderwood at Earls Court Empress Hall in Kensington on 12 January 1959. The fight was an undercard bout to the Henry Cooper vs. Brian London British and Empire Heavyweight title fight, and Calderwood was quick becoming a serious contender for the Lightheavyweight British title with wins over both Mooney and Rowe, who had both defeated Sangoe. Sangoe lasted until the fifth.
