ChateauMargaux
The convincing narrative comes in where the crime is an 'historic' one. That is to say it is outside the forensic window. So we only have the account of the victim/survivor. There will be no witnesses, no CCTV, DNA etc etc.
Unless the suspect has admitted the offence - you are going to have one word against the other, which usually for other offences will not result in a charge to court. But for rape offences, such a statement from the victim/survivor will be enough and CPS will charge.
"....If changes have been made and only 3% of reports are prosecuted, I would suggest that those changes are nowhere near sufficient...."
The changes that have been made include always believing the victim from the outset and not challenging their account, not putting any pressure on them to go through the medical procedure or go to court, have a specific SARC unit to attend for any medical procedure, have access to a number of support agencies, have an allocated ISVA, regular updates for the victim/survivor, early arrest of the suspect as they will also be in a forensic time window, use of dry cells and medical swabs from them, specific police teams to investigation (CID, DV, CAVA), specialist CPS lawyers for rape cases, specialised rape & sexual violence courts with a host of special measures (video links etc)
These are the changes that have been made - what other suggestions or measures would you like to see?