Japanese carmaker Nissan is expected to announce as early as this week an investment to expand its battery production in the UK with partner Envision AESC.

The renewed speculation comes after Envision Group’s ceo Lei Zhang told Bloomberg News that the company’s project in the UK is set to “increase” the country’s battery output. He said the project would go beyond supply just Nissan in Sunderland, though he didn’t provide further details.

Previously, Nissan was reportedly in talks with the British government after support for a new gigafactory, potentially able to produce up to 200,000 batteries per year. The carmaker has not confirmed any of the rumours but has said its Sunderland plant is crucial in its electrification strategy.

Nissan started EV and battery production in the UK in 2013 for the Nissan Leaf, at the Sunderland factory, through a partnership with Envision. Earlier, a spokesperson for the carmaker had said Nissan will continue electrifying its line-up, although there were no further plans to be announced just yet.

Nissan didn’t respond to Kallanish’s requests for comment.

If and when confirmed, the expected 6 gigawatt-hours plant, which would later be ramped up to around 18-20 GWh/year, will be the third announced gigafactory in the country.

The first was AMTE Power’s 2 GWh plant slated to enter production in 2022 and the second Britishvolt’s £2.6 billion ($3.6 billion) Blyth project planned to enter production by late 2023. The latter is set to eventually produce 300,000 batteries/year by 2027.