Yesterday (27th), I received a message from the volunteer rangers letting me know that there was a swan species on the middle reservoirs. Unfortunately, the bird was too distant to identify accurately, other than to say that it was a young bird, with grey feathers and a grey beak.
I managed to get down after work, and, luckily for me, the bird had moved much closer to the dam wall, allowing me to see that it was a juvenile (born last year) Mute Swan. This record is the first of this species since 2013!!!