Posted By paulw71 depending on the age of the building I would have riser checked for asbestos.

Posted By paulw71 I wouldnt have thought so unless any fire barriers or flame retardent materials are being removed from the risers while the plastering is being done. dont mean to state the obvious but there should be something in place to prevent water from the plaster dripping into busbar chamber. people doing the work should have the dangers pointed out to them, also they should be shown how to isolate supply in event of an accident, trained in rescusitation of electric shock victim. Is there a work at height issue ?, Escape/rescue plan. Make sure access to riser is secured when workers are not in there present. Sorry if im stating the obvious to you.

Posted By riskybizz paul, thanks for taking the time to respond, i asked for advice simply to gather specialist information. Although some of the information given did state the obvious, it acted as a cross reference of my own action.... Thanks again