CREATE TABLE table_22269 ("Departure" TEXT, "Going to" TEXT, "Calling at" TEXT, "Arrival" TEXT, "Operator" TEXT)

What is the departure for Peterborough East whose arrival time is 12.40?
SELECT "Departure" FROM table_22269 WHERE "Going to" = 'Peterborough East' AND "Arrival" = '12.40'
SELECT "Departure" FROM "table_22269" WHERE "Arrival" = '12.40' AND "Going to" = 'Peterborough East'