Little did they know that when they woke up, their working lives would be changed forever.

By the next morning, the shocking images had reached the news channels and the internet — footage of Transocean’s four-column semi-submersible Deepwater Horizon rig being consumed by huge columns of black smoke and flame.

The Macondo prospect of BP, the reining deep-water technological leader in the US Gulf of Mexico, had blown out in uncontrolled fashion.