Question: Which Servedby has a Local authority [a ] of Thurrock, and a Station of Ockendon?
SQL: SELECT "Servedby" FROM "2-15569035-1" WHERE "Local authority [a ]" = 'Thurrock' AND "Station" = 'Ockendon';

Question: Which Station users 2005–06 has a Station users 2004–05 of 2117300?
SQL: SELECT MIN("Station users 2005–06") FROM "2-15569035-1" WHERE "Station users 2004–05" = 2117300.0;

Question: How many Station users 2005–06 that has a Station users 2004–05 of 1455700?
SQL: SELECT COUNT("Station users 2005–06") FROM "2-15569035-1" WHERE "Station users 2004–05" = 1455700.0;