Abstract On the afternoon of 14th October 2018, a swift with a white rump was found at Hornsea Mere, Yorkshire. The bird was initially feeding alone but later joined a group of House Martins Delichon urbicum at the western end of the mere, where it showed well and was photographed. After some initial deliberation over its identity, photographs established that this was a White-rumped Swift Apus caffer. Many observers were able to enjoy this first for Britain before it disappeared as the light began to fade, and it was not seen again. The record has been accepted by BBRC and BOURC and added to Category A of the British List.
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