Rolf Harris has been passing time in prison by making didgeridoos out of toilet rolls, it has been claimed.

The disgraced entertainer, who was jailed for indecent assault against four girls, has been reportedly crafting his version of the Aboriginal instrument with cardboard tubes and matches.

And although the guards continually confiscate them, the 85-year-old keeps collecting the rolls so he can play the makeshift instrument in his Stafford Prison cell, reports the Sun.

A source told the newspaper: “He joins the tubes together with matchsticks, it’s driving everyone mad.

“He sits in his cell and tries to play his home-made didgeridoo. It’s not the real deal but it acts as a therapy for him.”

In 2014, Harris was said to have carved a wooden didgeridoo from materials he found in the jail garden at his former prison HMP Bullingdon, in Oxfordshire.

It reportedly took a month for him to create the instrument, which was about 3ft long and has been decorated on the outside with figures and images.

But it was later confiscated by guards.

Since being moved to Stafford, Harris is said to have joined the choir, singing with other inmates during Sunday services.

The Australian-born artist is currently serving a six-year sentence for sex offences against four girls, one aged just seven or eight.

He was convicted in July 2014 of the offences that were committed between 1968 and 1986.

In April of this year, Harris pleaded not guilty to eight new sexual offences – including one alleged to have been committed on a disabled woman.

Online Editors