Those sort of actions already destroy the notion that the trial is normal to begin with.
That is because this proceeding is not a trial, and never was. The government (there is no prosecution here) is not trying to prove Assange's guilt, they're trying to prove that there is a criminal case against him in the US (i.e., meaning that he has been charged with crimes in the US and will be prosecuted on those charges in the US, and from a legal standpoint also that the charged activities would be crimes under UK law).
There is literally nothing the defense can do to disprove the existence of a criminal case against Assange in the US if the government succeeds, so there is no reason to allow the evidence of Assange's purported innocence. Because it's irrelevant to extradition. https://www.gov.uk/guidance/extradition-processes-and-review
The only reason the defense is being allowed to challenge extradition is because they're arguing its illegal under UK criminal rights provisions, such as those disalllowing extradition if it would result in torture, or if the defendant is mentally ill (but in such case extradition is only tolled for the duration of the mental illness).
That is because this proceeding is not a trial, and never was. The government (there is no prosecution here) is not trying to prove Assange's guilt, they're trying to prove that there is a criminal case against him in the US (i.e., meaning that he has been charged with crimes in the US and will be prosecuted on those charges in the US, and from a legal standpoint also that the charged activities would be crimes under UK law).
There is literally nothing the defense can do to disprove the existence of a criminal case against Assange in the US if the government succeeds, so there is no reason to allow the evidence of Assange's purported innocence. Because it's irrelevant to extradition. https://www.gov.uk/guidance/extradition-processes-and-review
The only reason the defense is being allowed to challenge extradition is because they're arguing its illegal under UK criminal rights provisions, such as those disalllowing extradition if it would result in torture, or if the defendant is mentally ill (but in such case extradition is only tolled for the duration of the mental illness).