Complex sentence: Jordan then founded the National Socialist Movement in 1962 (later this became the British Movement in 1968) with John Tyndall; at around this time he was dismissed by the board of governors from the school where he taught.
Split into simpler sentences: Jordan then founded the National Socialist Movement in 1962 (later this became the British Movement in 1968) with John Tyndall. At around this time he was dismissed by the board of governors from the school where he taught.