404. That’s an error.
The requested URL /search.php?subject=supplementary&subject_facet=Great+Britain.+Department+of+Health+and+Social+Security.+Supplementary+Benefits+Commission was not found on this server. That’s all we know.
/search.php?subject=supplementary&subject_facet=Great+Britain.+Department+of+Health+and+Social+Security.+Supplementary+Benefits+Commission