Complex sentence: In 1950 the church's flat roofs had to be repaired once more after the lead lining them was stolen and 3 years later more roof work was completed when the building tiles were replaced, the tower and north chapel were also repaired at this time.
Split into simpler sentences: In 1950 the church's flat roofs had to be repaired once more after the lead lining was stolen and 3 years later more roof work was completed when the building tiles were replaced. The tower and north chapel were also repaired at this time.