The Prime Minister has a spokesman, regularly quoted in newspapers.
Mrs May spoke to the Queen on the phone on Easter Monday to let her know of the election plan, the prime minister's official spokesman said. She also got the full backing of the cabinet before calling the election. http://www.bbc.co.uk/news/uk-politics-39629603
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.