Mamata Banerjee, who swept the Bengal election but lost her own contest in Nandigram, is set to return to the seat she gave up in favour of challenging her former aide Suvendu Adhikari in his stronghold. The Trinamool MLA who won from Bhawanipore, Shobhandeb Chattopadhyay, resigned from the Bengal assembly this afternoon to enable his party boss to contest from the seat.