La Rance tidal barrage, North coast France. installed 1967.
Sihwa Lake Tidal Power Station, South Korea (worlds largest). Completed 2011.
Beauty of tides is, they occur like clockwork, and occur at night, and who doesn't like more transport connectivity? and jobs, and cheaper energy.
The largest tidal range (difference between low & high) in the world is the Bay of Fundy in Canada.
Second largest in the world? Severn estuary england. Second largest in the uk? River Mersey. It's not on our doorstep, it is our doorstep. The entire West coast could be utilised to realise tidal power and then hydro storage in the helpful topography of the locales. It takes outlay, and time to recover the initial cost. La Rance paid for itself under 20 years.
The second largest tidal range on the planet.