Complex sentence: In 1974, Les applied to work at BRMB, they rejected, so in the Summer of 1975, he joined Radio Tees in the North East of England, presenting their Breakfast show.
Split into simpler sentences: In 1974, Les applied to work at BRMB but they rejected him. So in the summer of 1975, he joined Radio Tees in the North East of England, presenting their Breakfast show.