Bentley is still to decide how it will expand the Mulsanne range following the creation of an open-top concept version last year.

The Mulsanne convertible concept was shown in private at the Pebble Beach show last summer, and Bentley chief Wolfgang Schreiber has said the concept met with a favourable reaction by all who saw it.

He said the convertible was "one option for the expansion of the Mulsanne range" and the firm had "two more" concepts it could show.

"In the next few months we will decide where to go with the Mulsanne but we haven't made that decision yet," said Schreiber. "We had very positive feedback from the convertible concept but we need to investigate carefully what we really need for the Mulsanne."