former model bianca was targeted by the gang of eight on tuesday afternoon .
the attackers are understood to have grabbed her phone and attempted to snatch her bag , but ran away when she fought back .
bianca gascoigne , the daughter of troubled ex-footballer paul , who was mugged by a gang .
bianca , pictured with paul and brother regan , had her phone stolen which reportedly contained private texts .
miss gascoigne took to her twitter page after the attack , where she branded her muggers ` lowlifes on bikes ' the 28-year-old talked on her mobile while walking in marylebone .