The law should take into consideration evidence showing that rape victims can suffer 'involuntary paralysis' in sexual assault cases, experts have said.

Nearly a third of women are thought to experience sexual assault or rape in their lifetime and, of those who attend an emergency clinic, 70 per cent report being 'frozen' during the ordeal.

Some victims are blamed for not fighting or fleeing their attackers.

But researchers argue such trials should consider neuroscientific evidence that suggests fear and threat can cause victims to 'freeze', making them unable to move or cry out even if they wish to.

Scientists from University College London (UCL) highlight a case in Australia in which the defence lawyer questioned the victim as to why she froze and did not show signs of struggle - transferring the blame of the sexual assault to her.