We are a flexible packaging manufacturer with BRC/IOP accreditation to category B.
Our protocol for hand-washing is basically as Simon describes above. The old chestnut that keeps being raised is whether hot air dryers or disposable paper towels are best for drying of the hands. In my experience, I have found that by having both methods available, it satisfies all audits, with comments being raised against having both, rather than being picked up for not having the auditors preference. One method we don't employ is the 'continuous' cloth towel.
Liquid sanitisers have been placed at strategic places to catch the 'through-traffic' of office staff, who incidentally seem to be the worst offenders, not only for not washing hands, but also non-removal of watches, jewellery, incorrect hairnet application etc. <_<
Inside the manufacturing environment, we have the liquid soap dispensers, along with varying designs of water tap, depending on the age of the department - the important point being that standard types of taps are so far deemed to be acceptable to our auditors, and that the allocation of BASIC handwashing facilities is sufficient to satisfy the requirement (disposable paper towels being far better than a standard hand towel for obvious reasons!)
The channelling of all traffic into the department past the handwashing stations is, I feel, critical to the success of the operation, as is clear signage as to the requirements (human nature being what it is.........)
We initially went through the exercise of looking at full replacement of all stainless steel sinks, knee-operated water taps, sanitisers, non-contact hand dryers etc, but as already mentioned, the basic liquid soap and paper towel method satisfies.
One point I would like to make though, is that if the warm/hot water iss too hot to use, the tendency is to use the cold water supply to wash hands, which can run you into conflict with some auditors. :)
Anyway, enough said. Hope that this is of some help.