It's also worth thinking about the value of these sites in terms of heritage, and, as part of the commission’s consultation, Cadw and the Association of Local Government Archaeological Officers emphasised that some tips have value for their heritage, and that any restoration work should bear this in mind. The coal tips in the Blaenavon industrial landscape, for example, are designated by the UNESCO World Heritage Committee as a world heritage site. A number of historic coal tips have been registered as historic environment sites, and this is something that is considered in the planning process.