Disgraced Australian entertainer Rolf Harris has had one of 12 indecent assault convictions overturned by the Court of Appeal in the UK.

The three judge panel announced their decision on Thursday, ruling that the conviction was "unsafe".

It concerned an alleged assault on an eight-year-old autograph hunter at a community centre in Portsmouth in 1968 or 1969.

The alleged victim claimed that Harris had groped her.

The judges rejected applications by the 87-year-old artist and musician to challenge the other 11 convictions - which included two indecent assaults on girls in their early teens and a catalogue of abuse against his daughter's friend over a period of 16 years.

All of the assaults took place between 1968 and 1986.

The TV presenter had been convicted at London's Southwark Crown Court in June 2014, and was jailed for five years and nine months, but was released in May this year.

He was not in court for Thursday's ruling and the prosecution did not seek a retrial, with the judges agreeing that a further trial would not be in the public interest.