“Port Talbot will be the forefront of a pioneering, new, clean energy industry,” said a UK government spokesperson.

Labour Welsh secretary, Jo Stevens, said it was a “significant moment for Port Talbot and a major step forward for the growing clean energy industry in Wales”.

“This investment will further cement Port Talbot as a hub of the industries of the future and heralds the next chapter of jobs and investment to the area.”

She added that clean steel-making, the development of the Celtic Freeport, and the expansion of floating offshore wind, meant Port Talbot was firmly at the heart of south Wales’s growing clean energy economy, supporting thousands of new jobs and helping deliver Britain’s clean power mission.

Grant arrangements for the port development have been agreed between the UK government and ABP, with the release of funding still subject to regulatory checks and final approval.