That would be a PACE witness statement, wouldn't it?
I think it has to be properly worded to be one though.
Was the loophole the unsigned NIP affair? That one has been closed.
You sign the PACE witness statement but you clearly state that it is a witness statement and that as you have provided the information before being cautioned ('you have the right to remain silent', etc.) it can not be used as evidence against you in court.
(The fact that the NIP has a caution written on it isn't relevant as they can't prove that you read, understood it or 'recognised it's significance').
People have gone to court on this and lost though. But it seems to me like the best option available at the moment.
Even if you had been cautioned by a real police officer 'you have the right to remain silent'
I'm talking purely form memory so don't trust my word on that.
