I think it will be a damp squib, there will be none of the touchy feely policing that happened in central London, skateboarding and dancing with protestors sanctioned by Sadiq Khan, the bye laws and responsibly for policing around Heathrow is out with his control.
when threatened with life imprisonment and / or a million pound fine (max sentence under law) backed up by police allowed to do their job and their “courage” Will soon melt away (who can forget the tears by the teenagers last time they tried it.)
the third runway will never happen anyway.