None as far as I know, but they all have very different rules about when "charge" is possible. And about what is possible after charge (not least further interviewing about new evidence that has come to light). (Go have a look at the Italian investigation into the murder of Meredith Kercher - people arrested in Nov 2007 and not charged (in the same way as charge would be referred to here) yet so far as I am aware).how many other countries have 42 days, or anything near 42 days?
Our combination of rules does not work with ever more complex and time-consuming investigations which simply cannot be speeded up to any great extent. Hence we need to address those rules. For some reason the focus has been on the extension of pre-charge detention periods as opposed to altering the other rules, to allow earlier charge, or to allow post-charge interview about new evidence.

) being used to snoop on parents is absolutely nothing at all to do with creation of any new offence. It is not even anything to do with an offence (it is enabling legislation, allowing surveillance to be used). There is absolutely nothing "new" about it at all - except for the fact that the papers (and fuckwits) seem to have gone into one about it. 