Baroness Thatcher's funeral cost the taxpayer an estimated £3.6 million - including £2 million "opportunity costs" for police who would have been on other duties on the day, Downing Street said today.
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Ukip leader Paul Nuttall also said he would want to get rid of Sharia courts.
Over 40,000 people picked up their packs to take part in the annual marathon in the capital.
The country's voters are concerned about security, the economy, and the 10% unemployment rate.