Senior politicians have defended the decision to allow alleged war criminal Ben Roberts-Smith to attend the opening of a major new gallery at the Australian War Memorial.

All living Victoria Cross recipients have been invited to Tuesday night’s official opening of the memorial’s atrium and Anzac Hall, a gallery focusing mainly on Australia’s commitments to the Middle East, Afghanistan and peacekeeping operations.

Despite a looming trial for five counts of the war crime of murder, Roberts-Smith has had his bail varied to attend the event.

Defence Minister Richard Marles said it was appropriate for Roberts-Smith, an Afghanistan veteran, to be there as a recipient of Australia’s highest military honour.

“The Victoria Cross recipients have been invited to this, which is appropriate. I’m comfortable about that,” he told ABC TV on Tuesday.

Prime Minister Anthony Albanese and One Nation Leader Pauline Hanson will also be among those attending the opening.

Hanson said she hoped to speak to Roberts-Smith at the event and said he was welcome to attend as he hadn’t been convicted of a crime.

“He’s still innocent til he’s been proven guilty,” she said in Canberra.

“I’m hoping to actually catch up with him, say hello to him, give him my support.”

Roberts-Smith is accused of murdering or ordering the murders of five unarmed detainees while deployed in Afghanistan between 2009 and 2012.

After the successful bail hearing earlier in June, he said outside court it was “absolutely” appropriate he attend the opening as a Victoria Cross recipient.

Roberts-Smith has also applied to move his home address in south-east Queensland, in part because he wanted to be closer to family.

The court was told Roberts-Smith he had to rent a new home because their parents had sold theirs and were moving back into the house he was living in.

Lawyers were back in court on Tuesday for further arguments on those variations to his bail conditions.

Roberts-Smith has categorically rejected the war crime allegations and has vowed to fight them in court.

Veterans who have spoken out against Roberts-Smith, including several who he is not allowed to speak to under strict bail conditions, are also expected to attend.

Albanese will tell those gathered they are bonded by the power of “lest we forget.”

“That most unadorned of sentences that dwells within us like a heartbeat – we vow to keep the flame of memory burning so brightly that its glow reaches future generations,” he will say in a speech.

“Today we adjourned the parliament so that everyone who wished to could come mark the opening of this Atrium and Anzac Hall, an addition to the Australian War Memorial that makes that flame burns so much brighter.

“What a sublime and powerful addition it is. A bold vision turned into a reality that enhances the institution of which it is now part.”

Albanese will implore those gathered at the event to “read all the words” about those who have gone before them.

“Look at the faces and get lost amid the smiles, the hope and camaraderie – the counterpoint to war’s relentless, inhuman arithmetic. They are its true cost,” he will say.

“Yet, amid this loss and sacrifice, what pulses so powerfully is life, and an abiding sense of what is worth fighting for.”

Anzac Hall and the memorial’s revamp will add more than 5000 square metres of gallery space when completed in 2028.

The redevelopment has been underpinned by more than $550 million in federal funding.

The institution has consistently defended displaying an image of Roberts-Smith, from which the body of a dead man has been cropped out.

The picture shows Roberts-Smith standing in a field in Tizak in the Kandahar Province of Afghanistan.

A plaque underneath it has been adjusted several times to reflect Roberts-Smith’s arrest and previous civil court cases.

-AAP