What does HWF stand for?

I had a similar situation; however, fortunately without an auditor on site and contacted the soap manufacturer to ask them whether the soap was still effective; they confirmed in writing that it was and so I briefed the teams to explain it that the boiler had gone down; it was uncomfortable but still safe and please ensure hands were still washed properly. As the auditor was insisting it was illegal, however they might not have accepted that but I still think that was sensible in the factory I was in and would at least try to defend it. I recall a similar situation though where I couldn't find a reference on what the temperature should be, until I worked in sandwiches and the British Sandwich Association came up trumps!"i) Hand wash facilities.