Complex sentence: After the purchase of NCP by Cinven, the company was purchased by Direct Line in 1999-following the purchase of Direct Line by the Royal Bank of Scotland, Green Flag is now a part of RBS Group.
Split into simpler sentences: After the purchase of NCP by Cinven, the company was purchased by Direct Line in 1999. Following the purchase of Direct Line by the Royal Bank of Scotland, Green Flag is now a part of RBS Group.