Land Rover has revealed it will produce a convertible version of its best-selling model to date - the Range Rover Evoque.

The Midland car-maker first showed a Range Rover Evoque Convertible Concept at the 2012 Geneva motor show and speculation had been mounting in recent months that it was set to go into production.

Land Rover says the new Evoque will be the world’s first premium compact SUV convertible.

The drop-top SUV will be built at Land Rover’s Halewood plant in Merseyside where existing Evoque and Discovery Sport production takes place.

It will go on sale in 2016 and Land Rover marked the latest announcement with the release of an underground testing film.

The first prototype of the Evoque Convertible was given exclusive access to the 26-mile network of Crossrail tunnels 40 metres below the streets of London.

The film shows the convertible being lowered into the tunnel network by crane, before negotiating a range of obstacles through the 6.2 metre diameter tunnel.

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Murray Dietsch, director of Land Rover Programmes said: “The tunnels are still under construction, so we had a unique opportunity to explore the vehicle’s all-terrain ability in unchartered territory.”

Land Rover will announce further details about the Evoque Convertible later this year.

It follows in the footsteps of three and five-door versions of the Evoque premium compact SUV, which has seen the marque’s global sales soar and profits surge.

In the year to April 2014, JLR posted the largest profit seen in the West Midlands with a pre-tax profit of £2.5 billion, up from £1.67 billion in 2012/13.