From working part-time as a waiter to help pay his student tuition fees, to becoming the boss of an award-winning Indian restaurant – Saif Islam is nothing short of inspirational. The 37-year-old, who has also now taken on the pub world, talks to Davina Jethwa about the secret to his success. Saif, owner of Sundar Rachana in Rainham, has big plans for The Three Mariners next door. Sitting side-by-side in the middle of the lengthy Lower Rainham Road, the two businesses complement each other very nicely. Saif said: “Sometimes we get 100 people here [in the restaurant] so most of our customers co…