Complex sentence: In 1977, BAC was nationalised, along with Scottish Aviation and Hawker Siddeley, to form British Aerospace (BAe), which later became part of the now-privatised BAE Systems.
Split into simpler sentences: In 1977, BAC was nationalised along with Scottish Aviation and Hawker Siddeley to form British Aerospace (BAe). BAe later became part of the now-privatised BAE Systems.