Complex sentence: The company was formerly listed on the London Stock Exchange, delisting in 2003; it had a turnover of almost £33m, in 2011, with a quarter of this coming from sales in mainland Europe.
Split into simpler sentences: The company was formerly listed on the London Stock Exchange, delisting in 2003. In 2011, it had a turnover of almost £33m, with a quarter of this coming from sales in mainland Europe.