Office of Public Works The OPW applied for planning permission to Castlebar Urban District Council in and around 1980 on behalf of the Minister for Posts and Telegraphs/Telecom Eireann for the P&T Engineering Headquarters in Castlebar, County Mayo. The above letters have been obtained in relation to the same which may be of assistance. • I wish to obtain the full OPW file associated with the planning application. To note that the planning file is unavailable with Mayo County Council and this planning file is therefore not in the public domain, as it would ordinarily be.