CREATE TABLE table_18118221_1 (main_services VARCHAR, total_passengers__millions__2011_12 VARCHAR)

What is the main service for the station with 14.849 million passengers 2011-12?
SELECT main_services FROM table_18118221_1 WHERE total_passengers__millions__2011_12 = "14.849"
SELECT "main_services" FROM "table_18118221_1" WHERE "14.849" = "total_passengers__millions__2011_12"