In 1980 written off WA class freezer van 23458 was rebuilt as flat wagon QG23405. It was followed by the conversions of 23451/5/7, 23467/8 in 1982, 23471/2/4, 23453/4 in 1983 and finally 23456/9, 23466 in 1984. All of these conversions retained their original numbers.

The entire class was written off in 1993.