I was watching on telly the Eurovision Song Contest held in Brighton on April 6, 1974, when Abba burst on to the stage with this brilliant number which would have done well in any milieu, but in the dreary Eurovision it was the equivalent of a nuclear bomb.
Honestly, it was thrilling.
For your interest, here is the voting presented by Katie Boyle.
This shows the announcement of the result with a reprise by the winners:
And here is the entire programme
The song was written for the Eurovision show by group members Benny Andersson and Bjorn Ulvaeus, with the group’s manager Stig Anderson. It topped the UK chart and made No 6 in America. At the contest’s 50th anniversary celebration in 2005, it was chosen as the best song in its history.