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We have at least recently ended the appalling practice of non-time-limited police bail.

It still takes 2-3 years to get to trial for serious offences during which time your name and face are plastered all over the papers (at least locally).

Mounting a successful defence can cost 10s to 100s of thousands of pounds.

Fighting off charges of which you are innocent is not fun. If we assume that the UK's system is good enough to just increase the arrest rate and it will all come out in the wash this would destroy many people's lives.