The Prime Minister's Official Spokesman or PMOS is a civil servant charged with presenting the Prime Minister and the Government to the media in the best light possible, whilst maintaining the independence and objectivity of the Civil Service. The PMOS briefs press and broadcast journalists most weekdays when Parliament is sitting, giving the Prime Minister's line on current affairs as well as advance notice of government announcements due that day. Towards the end of the week, a briefing is given for correspondents from the Sunday papers.
On occasion, the PMOS post is held by a special adviser, lending a more political edge to briefings. The post can also be held by more than one civil servant. The edited content of briefings is made available to the public, although this is at the discretion of Number 10.