Mr. Niall Gleeson:

The context around this is how the plants were built in the first place. There was not much consistency in the way plants were built from local authority to local authority, so the equipment that was installed varies vastly from one plant to another and, again, there are 800 plants around the country, so there are big differences. We had introduced standard operating procedures but an operator would not necessarily be able to go from one plant to another and identify issues immediately. Ms Attridge might want to come in on that.