MUMBAI, July 6 -- Aaditya Thackeray, former environment and tourism minister and an MLA from Worli, may soon find himself in the piquant position of being the sole MLA of the Uddhav Thackeray-led Shiv Sena. Though the entire matter of the vertical split in the Shiv Sena is still pending in the Supreme Court, the new Speaker of the Legislative Assembly, Rahul Narwekar, has already begun the process of disqualifying 14 Sena MLAs who still profess allegiance to Uddhav Thackeray. However, a notice of disqualification will not be sent to Aaditya Thackeray, said sources in the Speaker's office, as he is the grandson of the Shiv Sena founder Balasaheb Thackeray....