CREATE TABLE table_name_48 (date VARCHAR, no_built VARCHAR, loco_nos VARCHAR)

On what date were less than 10 built with a locomotive number of 31-35?
SELECT date FROM table_name_48 WHERE no_built < 10 AND loco_nos = "31-35"
SELECT "date" FROM "table_name_48" WHERE "31-35" = "loco_nos" AND "no_built" < 10