Have the same problem with BT Web Protect. The "continue anyway" just brings up the same message.
Trying to access via a search engine shows that Norton software declares it an OK site, and the Malware detector is happy with it, but then up comes BT Web Protect and blocks access.
Have never seen this BT Web Protect in action before, though sites (which probably deserved it) have been blocked by other security software.
Edited By Robbo on 08/07/2017 09:10:54