Peaches Geldof, 24, has has more than 160,000 followers on Twitter and has previously written columns for the Daily Telegraph and Elle Girl and articles for the Guardian.
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Demonstrators gathered outside the National Press Club to oppose a group of Trump supporters who were staging a "DeploraBall".
Rosalind Brotherton initially started working at a school canteen but after studying part time is now in charge of a primary school.
The unexploded bomb was found near the Houses of Parliament and led to disruption in central London overnight.