APP-AP should be amended to cover the following: a. Sustained public protection should never be the object of an operation unless and until there is a clearly recorded note of the possible charge(s) that are anticipated, the evidence that will be required to establish guilt, the evidential (and, if appropriate, geographical) tipping points, and the probable sentence – expressed if necessary as a range within which the sentence is likely to fall, at the conclusion of any trial. b. This may necessitate the involvement of the Crown Prosecution Service (CPS), whose early advice should be sought if there is any uncertainty as to any of the matters set out in paragraph 15.16a. c. Written sentencing guidelines exist for almost all serious offences and, like the Criminal Procedure Rules (see paragraph 15.21), should be readily accessible to inform any opinion as to the probable sentence (see paragraph 15.16a).