CREATE TABLE table_28601 ("Year" FLOAT, "Under-11" TEXT, "Under-13" TEXT, "Under-15" TEXT, "Under-17" TEXT, "Under-19" TEXT)

When Julian Illingworth was the under-19, who was the under-15?
SELECT "Under-15" FROM table_28601 WHERE "Under-19" = 'Julian Illingworth'
SELECT "Under-15" FROM "table_28601" WHERE "Under-19" = 'Julian Illingworth'