Bharatiya Janata Party (BJP) leader Dhirendra Singh on Thursday filed his nomination for the Uttar Pradesh assembly polls from Jewar constituency, which he had won in the 2017 elections. The 55-year-old Singh is known, among others, for his key role in getting through the negotiations with farmers for the Greenfield Noida International Airport in the Gautam Buddh Nagar district in western Uttar Pradesh.