Protesters in Ludgate Circus near St Paul's cathedral booed and jeered as Thatcher's funeral procession made its way past. Many chanted: "Waste of money" whilst war veterans on the other side of the street applauded and cheered.
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The mum wrote the emotional letter after her eight-year-old with Down's syndrome was the only child in his class not invited to a party.
More than 1,800 litter pickers will clear an estimated 57 tonnes of reusable items and half a million sacks of rubbish.
Time for Project Let's-Make-the-Best-of-it.