CREATE TABLE table_15962 ("Song" TEXT, "Mobiles" FLOAT, "Northern Ireland" FLOAT, "Northern England" FLOAT, "Scotland" FLOAT, "Southern England" FLOAT, "Wales" FLOAT, "Total" FLOAT)

How many votes did Wales cast when Northern England cast 6?
SELECT MIN("Wales") FROM table_15962 WHERE "Northern England" = '6'
SELECT MIN("Wales") FROM "table_15962" WHERE "Northern England" = '6'