Buddenbrooks wrote

All prosecutions are under the approval of the CPS. They may do
nothing
and a prosecution can be made by others,
but the CPS can stop a private prosecution if they feel that it is
not in
the public interest.

The powers of the CPS vis a vis private prosecutions are those
previously exercised by the DPP.

They can't stop a prosecution just because they wouldn't have
prosecuted themselves in a particular case.

Also there is no requirement for anyone to inform the CPS that a
prosecution is taking place at all though there is a requirement for a
court to inform them when a prosecution is withdrawn.

This unfortunately has made the courts more political than when the
police
instigated proceedings.

Rather just part of the general tendency to try a judicial review
whenever dissatisfied. If the police still prosecuted they would be the
target of a claim rather than the CPS and indeed such has happened, eg,
for police cautions.


--
Mike D