This is a list of artists who have achieved one number-one hit on the UK singles chart and no other top 40 on the chart. The list uses the strict The Guinness Book of British Hit Singles definition of "one-hit wonder", a term also commonly used more loosely to refer to any act known primarily for one major hit.
Methodology A hit is attributed to the main artist given credit. If a single is released by two artists with the conjunction 'and' or 'versus' then both artists have equal billing (e.g. Yolanda Be Cool & DCUP, who have also been credited as Yolanda Be Cool vs. DCUP) and are both counted as having a number one (in this case "We No Speak Americano") whereas if the conjunction between two artists is 'featuring' or 'with' (or similar) then the first artist is considered the main artist for that hit, with the other artist listed being given a lesser billing (traditionally in these cases they would be additional vocalists or contributing instrumentalists, although in the 21st century it became common for the lead vocalist to be a 'featured' artist, with the main credit only affecting the chart in relation to the three-track rule).
Artists who are classed as one-hit wonders within the past twelve months are not yet added to the list, as they may still follow-up their number one with another hit. A one-hit wonder from earlier who now goes on to score another hit will be removed from this list.
One-hit wonders