Tidal energy is created using the movement of tides and oceans, where the intensity of the water from the rise and fall of tides is a form of kinetic energy that is converted into electricity.
It can be harnessed in three different ways - tidal streams, barrages and lagoons - but has been relatively uneconomical compared to other forms of renewable electricity such as wind and solar.
However, unlike those forms of generation, which produce variable electricity output depending on the climactic conditions, tidal energy offers a predictable and constant flow that makes it easier for engineers to design efficient systems.
The government said that it hopes the latest investment will boost the popularity of the technology. As part of the fourth allocation round of the 'Contracts for Difference Scheme' due to open next month, it will ensure that £20m per year will be ringfenced for tidal stream projects, giving the marine energy sector a chance to develop their...