Complex sentence: Russian businessman, Roman Abramovich bought two stucco houses in Lowndes Square in 2008 and when completed the merged house with a total of eight bedrooms is expected to be worth £150 million, exceeding the value of the previous most expensive house in London.
Split into simpler sentences: Russian businessman, Roman Abramovich, bought two stucco houses in Lowndes Square in 2008. The merged houses, with a total of eight bedrooms, are expected to be worth £150 million, which exceeds the value of the previous most expensive house in London.