What welfare facilities should be provided for workers on a demolition site?

People working at a demolition site must have access to at least the normal construction range of facilities including: toilets; large wash basins; running hot (warm) and cold washing water; washing consumables; a clean rest room with lights, heating and seating; drinking water, means to heat water/food; and an area for storing and drying work clothes. In addition if the work is dirty - and demolition work frequently is - then showers must be provided.