of the last of last year's event takes place every year on the river thames between sunbury and addingtonin oxfordshire enthusiastic are known as the royal swan uppers and collect birds to measure way and check them according to ancient laws dating back to 1186 all swans in the country are property of the british crown . this is the news more headlines at the top of the hour in the meantime you can keep up to date with all the latest news on our website that stevie dot com on the spicer thanks for march. when the water rises cities will sink into the sea. entire stretches of land will be abandoned. and the water has to. be stopped it's happening fast.