Yes, thank you NGB, much appreciated.
So what you are saying basically is that whilst there is no requirement to volunteer the information at all, to volunteer incomplete (although in itself accurate) and thereby misleading information could be seen as a positive act and may well be an offence, am I understanding that correctly?
Did they actually grant her immunity, or was there a decision (however it was arrived at) that it wouldn't be in the public interest to prosecute?
Yes, volunteering incomplete information, provided that this misleads the police, could be seen as a positive act of assisting the offender. Obviously each situation has to be assessed on its own facts.
My understanding is that Julie Mugford was granted immunity from prosecution in relation to all disclosed offences on the authority of the DPP and on that basis was inteviewed as a witness rather than under caution as a suspect.