CREATE TABLE table_80043 ("Units" TEXT, "Type" TEXT, "Period used" TEXT, "Formed from" TEXT, "Trailers" TEXT)

Name the trailers for formed from pan/pul/res cars
SELECT "Trailers" FROM table_80043 WHERE "Formed from" = 'pan/pul/res cars'
SELECT "Trailers" FROM "table_80043" WHERE "Formed from" = 'pan/pul/res cars'