Complex sentence: Schools with High Performing Status are allowed to take on a new specialism and so the school chose to specialise in vocational learning (now called Applied Learning) and this allowed the school to exercise the legal presumption in favour of opening a Sixth Form.
Split into simpler sentences: Schools with High Performing Status are allowed to take on a new specialism and so the school chose to specialise in vocational learning (now called Applied Learning). This allowed the school to exercise the legal presumption in favour of opening a Sixth Form.