A couple of female goosander in flight downstream. A while later two birds that I was unable to sex flew past the opposite way, so likely to be the same ones. Three individual kingfisher sightings, all of birds flying low on the river and downstream.
Other birds included: swift (several), black headed gull (numerous - one flock had c.100 birds), chiffchaff, great black-backed gull (3 distant birds soaring/in flight), lesser black-backed gull.