Spectators gather in light drizzle outside St Paul's Cathedral amid sea of union flagsCrowds have turned out to pay their respects to Lady Thatcher as the prime minister, David Cameron, defended her ceremonial funeral as a "fitting" tribute to a major national figure.As the first of more than 2,300 guests began arriving at St Paul's Cathedral before 9am, many hundreds of spectators gathered in the light drizzle outside, amid a sea of union flags.