As twitches go this one was very easy. Park your car and walk a couple of yards and view just over the fence. Not quite an epic, but it was a glorious day today. The light was poor first thing and in the afternoon the sun was in your face, so photography was challenging.
I can't profess to be an expert, but reading various bits written by people with more experience I think it is worth considering whether it is actually a N American bird. That said the strong winds recently might lead one to consider a westerly origin for it, but when did it actually arrive here?