If you think you saw a ballerina flitting about London during the previous week, your eyes weren't deceiving you. It was French "Extreme Ballerina" Agathe Petrini
, who usually does her daring photo shoots in the Alps. The 21-year-old was brought to London by Virgin Active to launch its new fusion ballet class "Barre". Here she is posing on a Tube sign with The Shard in the background.