Olso-listed shipowner SD Standard ETC is investing in oil and gas exploration company Dolphin Drilling, despite its avowed switch into renewables.

The Cyprus-based investor in platform supply vessels (PSVs) said it is taking a 25% stake in the Aberdeen-based rig owner through a $10m share issue.

The company, backed by tycoon Oystein Stray Spetalen, also has warrants to invest an additional $5m for a total stake of 32.5%.