The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
http://74n5c4m7.r.eu-west-1.awstrack.me/L0/http:%2F%2Fwww.hse.gov.uk%2Fstatistics%2Fcausdis%2Findex.htm/1/010201670d75cbb5-c6915d49-68cb-4352-99e8-753c6fa62661-000000/HFVXrdwtj4D3aYOZmshlBD_mMNw=83