Singer and activist Charlotte Church has performed a Titanic-inspired protest song over oil giant Shell's efforts to drill in the Arctic.

Charlotte Church sang "This Bitter Earth". Credit: PA

Ms Church sang with a string quartet close to the oil company's London headquarters as part of a month-long protest by Greenpeace, who warn drilling in the Arctic could lead to environmental disaster.

The Greenpeace protest today in London. Credit: PA

She told supporters her rendition of Dinah Washington's This Bitter Earth was aimed at Shell staff in a bid to make them question the company's actions.

The performance, sheltered from the pouring rain under a railway arch, was inspired by the string quartet on the Titanic who continued to perform as the ship sank after hitting an iceberg, Greenpeace said.