In a special edition Cilla Black introduces Cliff Richard in A Song for Europe 1973

Tonight Cliff Richard sings all six Songs for Europe:

'Come Back Billie Jo' by Mitch Murray and Tony MacAulay

'Ashes to Ashes' by Tony Cole

'Tomorrow Rising' by Brian Bennett and Mike Hawker

'The Days of Love' by Alan Hawkshaw and Dougie Wright

'Power to All Our Friends' by Guy Fletcher and Doug Flett

'Help it Along' by Christopher Neil

Viewers are invited to select the song which will represent the UK in this year's Eurovision Song Contest.