Hi Roz and welcome to the forums. Please see below:

Application to non-employees:

Although these regulations do not apply to people who are not employees, for example voluntary workers, children while in school, students at university and visitors to worksites; there is provision within section 3 of the HSW Act that requires every employer to ensure, so far as is reasonably practicable, that persons not in their employment but who may be affected by the work are not exposed to risks to their health and safety. If employers are required to provide PPE to comply with a section 3 duty, by following the requirements of these regulations they are likely to do so, for example having a stock of hard hats, hi-vis jackets or disposable overalls for the use of visitors. The regulations do apply to trainees and students on work experience programmes.

You can find the above article (25) here http://www.hse.gov.uk/pubns/priced/l25.pdf

Are you refering to managing volunteers from a H&S aspect or in general? I'm afraid you will have to refer to our friend Google for this. There should be enough guidance from various sources such as Charities.

I hope this helps.

I would echo the previous poster statements and also ask what you would do if a volunteer arrived without the PPE? Would you pack them off?

I would suggest you at least supply general use PPE if possible - hig vis vests, hard hats - which provided they are cleaned can be shared, rather than the individual getting to tke them home and never volunteering again.