Browsing what I have missed so far this year (loads!!) I see that single listers have claimed Redhead at Titchwell, Pallas's Reed Bunting in Dorset and Tree Swallow I think in Shropshire. Now they may well be correct but if so they kept very quiet at the time and I suspect that all three, and maybe a few less obvious ones, will be mistakes entering species.
Could there be an easy way of bringing such mistakes to listers' attention ?
Steve