One Nation leader Pauline Hanson says alleged war criminal Ben Roberts-Smith should be welcome to attend the opening of new hall at the Australian War Memorial extension this evening. It comes as parliament's lower house prepares to finish early to allow MPs to attend the ceremony. Mr Roberts-Smith is also expected to attend the event after his bail conditions over alleged war crime charges were varied in a Sydney court last week. Senator Hanson said Mr Roberts-Smith was innocent until proven guilty and had no reason not to take part "Why shouldn't he?" she said. "I'll be going, and I am hoping to actually catch up with him, say hello to him, give him my support."Defence Minister Richard Marles also said it was "appropriate" for Mr Roberts-Smith to receive an invite. "There is a presumption of innocence in this country, and Ben Roberts-Smith is a recipient of the Victorian Cross," he said."It's a very significant moment for the nation, and the Victoria Cross recipients to be invited to this is absolutely appropriate." But Greens leader Larissa Waters said she would not attend the event, saying it was "not appropriate" for Mr Roberts-Smith to be in attendance. The official opening of Anzac Hall, led by an address by Prime Minister Anthony Albanese, is the latest in several staged openings as part of the controversial $550 million War Memorial extension. Parliament's chambers typically adjourn to mark visits by high-level international visitors or to honour the deaths of distinguished figures