Nobody knows what the poster one of the protestors was holding before they were removed from the gallery.
Maybe this is what the poster looked like....
The arrangement of a fathers day protest - called D-day - 'Day of the dad' - a civil rights March organised for Friday June 18th 2004 - 'Dress in purple purple purple' it says on fathers 4 justice wales
website (note this site is on ntl webspace

) - maybe this is what they wanted to get across today....