It’s unusual though, Manitas - it’s certainly doesn’t seem to provide the same kind of jury-rigging opportunity as in the US from what I can gather. Here’s the opening paragraph from the ‘Jury Vetting’ section of the CPS website…

”In some circumstances, the parties to the case can challenge the empanelment of a juror through ‘Stand By’ or ‘Challenge to Cause’, full details of which are set out in this document. However, this would generally be an exceptional course and the prosecution should only exert its right to do so where it is essential and on the basis of the clearly defined criteria set out below. “

The full section is here…