The Director of Public Prosecutions Keir Starmer QC has told ITV Daybreak it is sometimes important to "look again" at Crown Prosecution Service decisions on whether to charge an individual.
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Colo became a mother of three, grandmother of 16, great-grandmother of 12 and great-great-grandmother of three.
The district's director of homeland security has said officials are planning for 800,000 to 900,000 people to attend the ceremony.
The Supreme Court is set to decide on whether disabled travellers are legally entitled to have priority use of wheelchair spaces on buses.