And you can never find any reports on this kind of thing online. I just tried. Ananova had nothing recent about Prudential. BBC, same story, more or less. Certainly nothing about protests. So I turned to http://groups.google.com. "Prudential protest" returned nothing likely looking so I shortened it to "Pru protest" since I'd managed to glean at least that word from a well spaced if not well placard. The first match was from alt.sex.spanking.moderated.
I give up.