https://www.google.co.uk/maps/place/The+Thames+Barrier/@51.4952563,0.0431819,3a,75y,16.59h,100.96t/data=!3m6!1e1!3m4!1sAF1QipMpdA1skNPa_lbweApQ4msZxVsR2XxOrzesY_6j!2e10!7i13312!8i6656!4m12!1m6!3m5!1s0x47d8a86645de7e2d:0x9bc80086a2472492!2sThe+Thames+Barrier!8m2!3d51.4969707!4d0.0369474!3m4!1s0x47d8a86645de7e2d:0x9bc80086a2472492!8m2!3d51.4969707!4d0.0369474

anyway, we are definitely in the right area, here - aren't we, dazzlenation?...see previous post....go figure: