Trinamool Congress supremo Mamata Banerjee, whose stir against use of farmland forced Tata to move its Nano car project out of West Bengal, has returned a cheque of over Rs 27 lakhs from a Tata trust after the just-concluded Lok Sabha elections.

"The cheque has already been returned to the trust. I am writing a polite letter (in reply)," Banerjee said here today. "I am writing a polite letter and the cheque has already been returned to the trust," she said.