Complex sentence: Manville died in harness in 1933, Percy Martin was forced out two years later, Frederick Lanchester resigned as consultant in 1936, Laurence Pomeroy was not re-elected to the board and left for de Havilland.
Split into simpler sentences: Manville died in harness in 1933, Percy Martin was forced out two years later, Frederick Lanchester resigned as consultant in 1936. That same year Laurence Pomeroy was not re-elected to the board and left for de Havilland.