Clear winner today - guy on a white Honda (Hornet?) this morning. I am filtering behind the OH, we're making good progress, nobbo is behind me. I stop behind OH whilst we wait for the gap to become big sized. Nob head pulls next to me on the right in a gap left by a van THEN BARGES IN FRONT OF ME. He is now ONE WHOLE BIKE LENGTH further than he was as he can't get past OH. Nobhead then proceeds to filter terribly, he is slow, terrible at gauging gaps and stalls at least once. I am now stuck behind him. I am not impressed. If you're going to barge in front of me at least have the decency to be good at filtering. OH has cleared off into the distance.