This is the Viking Link which has been in development since 2019. New interconnects are always welcome. In theory this can help us decarbonise and share excess renewable energy, although I know little about the Danish grid. Sounds like the connections are now made and it will be live by the end of the year.
We already have interconnects with Belgium (1GW), France (4GW total), Ireland (1 GW total), Netherlands (1GW), and Norway (1.4GW).
A shame that they don't mention the power it's able to support. Although they do say it can "power up to 1.4 million homes", which usually uses 1KW/home as a benchmark, so that would imply it's a 1.4GW link. (edit: ofgem confirms that it's a 1.4GW link)
Secondary article from BBC is here, although mostly the same info: https://www.bbc.co.uk/news/uk-england-lincolnshire-66235081