The astrophysicist and former Queen guitarist Brian May has said that Sir Patrick Moore's contribution to astronomy will be there "for all time".
He said that the late astronomer combined enormous generosity with a prodigious understanding of his subject:
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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.