text: 2 December – Frankie Goes to Hollywood become the first act to take their first three singles to the UK number-one position since Gerry & The Pacemakers in 1963, when "The Power of Love" tops the chart.
  3 December – Bob Geldof and Band Aid release the single "Do They Know It's Christmas?", which becomes the fastest-selling single of all time in the UK.
  11 December – While on tour, Bucks Fizz's tour bus crashes. All members of the group are injured and member Mike Nolan suffers brain damage after falling into a coma.
  13 December – George Harrison makes a rare public appearance, joining Deep Purple on stage in Sydney, Australia for their encore rendition of "Lucille".
  Charts
  Number one singles
  Number one albums
  Year-end charts
  Best-selling singles
  Best-selling albums
  Notes:
  Classical music: new works
  Jonathan Harvey – Come, Holy Ghost
  Alun Hoddinott –  String Quartet No. 2, Op. 113
  Robin Holloway – Viola Concerto, Op. 56
  Elizabeth Maconchy – String Quartet No. 13, Quartetto Corto
  Musical theatre
  Mike Batt – The Hunting of the Snark given its first performance in the Barbican with the composer conducting the London Symphony Orchestra.
  Howard Goodall – The Hired Man
  Musical films
  Give My Regards to Broad Street, with Paul McCartney