CREATE TABLE table_48919 ("Tie no" TEXT, "Home team" TEXT, "Score" TEXT, "Away team" TEXT, "Date" TEXT)

What is the Tie Number when the home team was West Ham United?
SELECT "Tie no" FROM table_48919 WHERE "Home team" = 'west ham united'
SELECT "Tie no" FROM "table_48919" WHERE "Home team" = 'west ham united'