I'm not suggesting the police find enough evidence to charge on the CPS standard before arrest -- as I said above, it should be abandoned entirely -- but enough for the pre-1985 standards. If this is impossible, I'd support an arrest on "reasonable belief", the standard Canada and the USA use.
Is writing an entry in a charge book a serious restriction on the police? The test surely comes when a magistrate examines the evidence, and I'd give the police 24 hours to find one.
I think we're getting tied up on semantics around "charging" here.
What we have now (and have had for years) is arrest on "reasonable grounds to suspect". The standard of proof for that is less than that required for a
prima facie case (the pre-PACE standard for charging).
We could quite easily substitute the old standard, and carry on the investigation post-charge but that would lead to two significant issues:
1. Many people would be unnecessarily charged, and find themselves dragged through the Court process, only for the case to fall apart later (avoiding that is one of the main things that the introduction of the CPS and the charging standards was intended to achieve)
2. With many, many more complex and time-consuming lines of enquiry (telecoms analysis, computer analysis, DNA, ...) now available than was the case even in 1984, to charge at the
prima facie case stage would mean that lots of evidence would come to light after the defendant was charged and thus no longer able to be questioned (except in tightly circumscribed situations which rarely arise). We could change the rule there and allow general post-charge questioning ... but I think all that that would achieve is that people would be kept stringing along on adjournment after adjournment whilst things are continuing, with no certainty.
What exactly is it that you would be hoping to achieve by going back to the pre-1985 situation?