The Rolls-Royce Sweptail, a one-off custom model costing a reported £10 million - the most expensive car yet commissioned - is enough reason for any high-end maker to get into the game. 

In the same way it suits Rolls-Royce’s clientele, Bentley customers are obvious targets for bespoke models costing upwards of £1m. 

But Bentley has had a tough few years, and has prudently focused on its main product line-up. As CEO Adrian Hallmark told us earlier this year: “Last year was not a great year for Bentley.

"We’d invested a huge amount of money in the previous five years and then launched the products from that investment. We’ve had to restructure and rethink the way we do things.”