CREATE TABLE table_46301 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Attendance" TEXT)

Which tie number had an away team of the Tranmere Rovers?
SELECT "Tie no" FROM table_46301 WHERE "Away team" = 'tranmere rovers'
SELECT "Tie no" FROM "table_46301" WHERE "Away team" = 'tranmere rovers'