Scilly power station

I'm always interested in how remote islands are supplied by electricity. The answer in the case of the Isles of Scilly is that there is a single cable connecting them to the mainland. That can get broken - https://www.bbc.co.uk/news/uk-england-cornwall-39166226 We were told that the station in the picture is the diesel backup. https://www.westernpower.co.uk/projects/isles-of-scilly