In his letter dated September 3, T Sivakumar, CPTM, SR, has asked the board to permit operation of train no 12633/12634 Chennai Egmore –Kanniyakumari express, train no 12693/12694 Chennai Egmore – Thoothukudi Pearl City express, train no 12671/12672 MGR Chennai Central –Mettupalayam Nilgiri express and train no 16181/16182 Chennai Egmore – Sengottai Silambu express.