Id recommend house sharing or rent a room, there are entire websites dedicated to this. its the way most students live. I also had a cousin who moved down here from the north, she rented a room first till she got established with a job and then rented a place. travel can be quite expensive but your oyster is capped at 6.20 per day after that its unlimited travel and on buses its £1 per journey. foods exactly the same price in supermarkets. i have found it that expensive just dont get a car you dont need it, gd luck. londons an amazing city youll love it! the people are nice, theres loads to do and its really not that expensive for nights out. i usually go to covent garden, a few beers in there bars generally not bad prices...avoid wimbledon village...£6 per corona!! lol you have to budget but £15k is enough, i lived off 11 for 3 years and did just fine :) gd luck