CREATE TABLE table_53916 ("Number & Name" TEXT, "Description" TEXT, "Livery" TEXT, "Owner ( s ) " TEXT, "Date" FLOAT)

What's the date for princess royal class locomotive trust?
SELECT "Date" FROM table_53916 WHERE "Owner(s)" = 'princess royal class locomotive trust'
SELECT "Date" FROM "table_53916" WHERE "Owner(s)" = 'princess royal class locomotive trust'