This Saturday night he is due to perform at Bristol’s Hippodrome, in a show that promises an opportunity to hear “classic songs” from “one of Britain’s best-loved entertainers”.

The promotional material promises that Mr Harris will perform his biggest hits including Stairway to Heaven, Tie Me Kangaroo Down, Sport, and Two Little Boys, with his seven-piece live band.

He will also paint a portrait live on stage.

“There is nobody quite like Rolf and there will be nothing quite like this show,” the ad says.

Mr Harris’ only other public appearance this year was in early February, when he performed at the Festival Hall.

He was in good spirits at that show, joking with the audience “I’ve had several requests. But I’m afraid I’m going to keep singing.”

The Daily Mirror reported he “looked sprightly” but appeared to be close to tears in an emotional third encore.

Mr Harris was interviewed under caution in November last year on suspicious of sexual offences. He was arrested again in March, two days before his 83rd birthday, and again released without charges.

At the time police said he was bailed “to a date in May pending further inquiries”.

In the last few weeks it has emerged police interviewed two women in Australia in connection with sex abuse claims.

One said she was a witness to an incident, another claimed Harris sexually assaulted her when she was a teenager in the UK.

A spokeswoman for the Hippodrome said ticket sales had been going “very well” for Saturday’s concert.

The venue’s website yesterday had only a few hundred seats left for sale, at the very back, from a capacity of almost 2000.

“The show is going ahead,” the spokeswoman said. “I am afraid we are not making any further comments.”

Asked if the management were treating the concert as ‘business as usual’, she replied “absolutely”.

However, the ‘Events’ page of Harris’ website says only “Sorry, there are no forthcoming events.”