None of the tidal schemes really work. Costs and silting major problems.Agreed the intelligent grid is slowly starting to happen .
Add in kinetic generating towers & slopes that load up during low consumption periods , tidal power stations , underwater & surface tidal generating machines . Then put in things like the Welsh Electric Mountain quick reaction turbines to help meet sudden peaks
Dinorwic is great but very expensive and limited by geography.
There is a solution that has worked for France for 50 years. Shame the rest of the World is too stupid to see it.