One less than minor point is that a H & S risk assesment needs to be done. Any specialist contractor will be able to provide this for their element of the work such as the roofers however for those who are volunteer workers, H&S needs to be in place otherwise in the unfortunate instance of an accident, all the good work could be undone by a accident claim. I can certainly provide RA and method statements for the security work

One area of particular concern has already been raised with the asbestos roof, but do we know if there is any more of the damned stuff else where. I'd want to know this before I started drilling holes

Sorry for that input item, but it should be covered chaps.

Bob