banks current danger England english flood flow Great Britain muddy river spate surge Sussex torrent trees turbulent water winter ancient architecture bothy construction entrance home house hovel mediaeval old reconstruction straw thatch traditional woodland flower natural nature path petal pink plant rambling red rosa rose stone summer arch box brick decorative garden gate hedge ornamental ornate wall wrought iron early lake mist Morning peaceful pond pool reflection rise rising spring cowslips downland flowers hillside Primula veris Primulaceae South Downs wild yellow Apiaceae flowerhead pattern petals umbellifer Umbelliferae white blue cloud drift grass hill landscape peace sky tranquil daisies daisy eye field Leucanthemum vulgare meadow ox plants