From the article -
"In June 2021, its original dark brown was re-painted in rainbow colours by an unidentified group of people intending to show support for the NHS during the pandemic."
"However, according to the Consistory Court ruling, this decision was taken “without seeking consent from the priest-in-charge or the Parochial Church Council, let alone from this Court” and provoked division among the parish."
So "... re-painted in rainbow colours by an unidentified group ... without seeking consent from the priest-in-charge or the Parochial Church Council, let alone from this Court”. That sounds to me as if someone decided that they knew better than everyone else and chose to impose their idea of how this bench (which was not theirs) should look on everyone else. Because they knew better.
Are they really 'unidentified'? It would have taken hours to do. Could it really have been done without anyone seeing who did it.