Complex sentence: Acquired by William and Alice Crocker, the school was extended in 1955 with the acquisition of the Senior School (Sandesfort House), which closed in 1998, but the Connaught Road building was transformed into the current Thornlow Preparatory School by its new owners in 1996.
Split into simpler sentences: Acquired by William and Alice Crocker, the school was extended in 1955 with the acquisition of the Senior School (Sandesfort House). The Senior School closed in 1998, but the Connaught Road building was transformed into the current Thornlow Preparatory School by new owners in 1996.