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	Thursday 30 September 2010 at 10.30pm on BBC Two Presented by Kirsty Wark How much of a danger to the economy is high frequency trading? Ultra-fast trading is now thought to account for over 60 percent of trades on the US stock market and over a quarter of trades in the UK. The Treasury has commissioned an investigation into it amid concerns over "flash crashes". And ahead of a report by US regulators into a crash on the Dow Jones that saw the index fall by 700 points in minutes, we'll consider how significantly this kind of trading impacts the stability of financial markets. Richard Watson will be investigating claims made by Baroness Warsi that the Conservatives lost "at least three seats" at the general election because of electoral fraud. Labour have called the allegations "unsubstantiated" and urged Lady Warsi to produce evidence. The Electoral Commission said police would need to investigate any claims. And we have a beautiful film in which Tim Whewell follows a former British civil servant as he returns to the part of Nigeria he was responsible for at the time of independence 50 years ago. John Smith - one of the few surviving members of the last generation of British colonial officers who ruled the country before independence in 1960 - describes what his life was like looking after 1,000 square miles of the country. Read more on that story: Remembering the last days of empire in Nigeria. Do join Kirsty at 10.30pm on BBC Two.
	LAST NIGHT'S HIGHLIGHT Stem cell doctor who treated MS patients struck off A doctor struck off by the General Medical Council for exploiting people with multiple sclerosis could be facing legal action by patients. A firm of solicitors said hundreds of "vulnerable people" who travelled to the Netherlands for treatment may seek compensation. Dr Robert Trossel treated them at his clinic in Rotterdam, following initial assessments in the UK. He charged thousands of pounds for unproven stem cell treatments. Susan Watts, who first investigated Dr Trossel's controversial treatments in 2006, reports. Watch the item
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