Prime Minister Narendra Modi will hold a roadshow and take part in the Ganga ‘aarti’ on Thursday, a day before he files his nomination papers from this Uttar Pradesh constituency, according to a party functionary. The nomination on Friday will also see a show of strength with several BJP allies, including Shiv Sena's Uddhav Thackeray and Janata Dal-United's Nitish Kumar, expected to accompany PM Modi when he files the papers.