Mayoral Elections ..... Campaigning: Ken Livingstone on the trail at Northolt mosque in Ealing over the weekend Pro-Ken Muslim group claims Boris 'would scrap the Koran' Andrew Gilligan 28.04.08 Ken Livingstone supporters are claiming that Boris Johnson would ban the Koran in adverts in the capital's Bengali-language press. The claim is one of a number of last-minute tactics - condemned by Mr Johnson today as "poison" and "desperate" - being used by Mr Livingstone's backers to sway crucial votes. The "dirty tricks" were uncovered in a Standard investigation which also found that: • Bengali-language leaflets are being handed...