The land in the south of England isn't rising. On fact, it's sinking as the north and Scotchland are still in the process of springing back after being compressed into the earth's crust during the last ice age.
Therefore sea levels should appear to be rising in southern England. If they're not, something is seriously wrong. Either the water is evaporating or draining away somewhere, or global cooling caused by the insufficient use of the internal combustion engine and the disastrous effects of the unnatural habits of vegans is causing glaciation somewhere else on the planet, robbing the south coast of England of its rightful sea water depth. This must be addressed immediately. Veganterianism and voting Libtard should be banned and it's practitioners rounded up and shot. Battery cars must be outlawed and the eating of red meat made compulsory.