Complex sentence: At Stockwell, the opportunity was taken to create a bravura piece of reinforced concrete design, building a formerly residential site cleared by the Blitz, and is a few hundred metres to the northwest of Stockwell tube station.
Split into simpler sentences: At Stockwell, the opportunity was taken to create a bravura piece of reinforced concrete design, building a formerly residential site cleared by the Blitz. It is a few hundred metres to the northwest of Stockwell tube station.