Ten people from the same family are believed to have died in the Air Algerie plane crash, AFP are reporting.
All 118 passengers and crew were killed after the plane went down in the West African state of Mali.
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The Duke and Duchess of Cambridge met young people who have battled mental health issues on Saturday.
Former Chancellor Lord Geoffrey Howe was Margaret Thatcher's longest-serving Cabinet minister, also taking on the role of Foreign Secretary.
Lord Geoffrey Howe is known by many for his resignation speech which was seen as the catalyst which destroyed Margaret Thatcher.