Indigo Bunting is available to BUBO Listers on lists using any authority. For people using BOU lists, however, it should be noted that the only acceptable bird for this authority is the first-winter male on Ramsey Island, Pembrokeshire, in October 1996. Other records have not been found acceptable by the BOU, including the well-watched bird at Holkham, Norfolk, in 1988.
Listers using the "official British & Irish" authority can also count the Indigo Bunting on Cape Clear, Co Cork, in 1985. So far as the UK400 club and Birdwatch magazine lists are concerned, we do not have information on which individuals are considered acceptable.