Seven-year-old Alma Deutscher, who has composed her own opera, has become an internet sensation. The youngster became a star after videos of her playing her music were viewed more than 300,000 times after her father put them on YouTube.
The first major composition by the skilled composer, violinist and pianist was also given the thumbs up by the English National Opera.
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The meeting was arranged in the wake of Wednesday's terrorist murder of four people in Westminster.
Dozens of women gathered on Westminster Bridge to form a human chain in a show of solidarity with the victims of Wednesday's terror attack.
In a wide-ranging Peston on Sunday interview, he said Parliament security needs reviewing and the PM's counter-terror strategy is flawed.