Complex sentence: Over the years, many apprentices were trained at the Porthcurno cable office in telegraphy and supporting skills and in 1950 Cable and Wireless opened an engineering college offering courses in branches of telecommunications on the site for employees, secondees and external students.
Split into simpler sentences: Over the years, many apprentices were trained at the Porthcurno cable office in telegraphy and supporting skills. In 1950 Cable and Wireless opened an engineering college offering courses in branches of telecommunications on the site for employees, secondees and external students.