A hydrogen-powered freight submarine and electric charging points on offshore wind turbines are the highest profile winners of the UK’s Clean Maritime Demonstration Competition.

The £23m ($32m) competition, the maritime beacon in the UK government’s ten-point plan for a Green Industrial Revolution, is aimed at spearheading the development of technologies that will have zero emission ships operating commercially by 2025.

But details were scant in the announcement by the Transport Secretary Grant Shapps of the highlighted projects which were named among 55 winning projects that will share in the total £23m grants.