THEY have never been the biggest vehicles on the road.

Designed by Sir Alec Issigonis as an economic little runabout, Minis are among the most compact cars ever to roll off the assembly lines.

Now motoring enthusiasts in Hampshire can admire one that is even smaller than usual.

The National Motor Museum, Beaulieu, is exhibiting a customised version that has been shortened by 29 inches and converted into a smart two-seater.

Built in 1991, the mini Mini started life as a standard Studio 2 model.

Earlier this year it was painted pink and turned into a mobile advertisement for a 1950s-style milkshake and ice cream diner in Bournemouth.

It even featured in a "Hunt the Pig" competition in which people were invited to search the Southbourne area for the eye-catching conveyance.

The conversion was carried out by staff at the Southbourne Motor Centre, who removed the roof and sealed the doors as well as reducing the length of the car by more than two feet.

The vehicle is being displayed at Beaulieu as part of an exhibition marking the 45th anniversary of Britain's most successful car.

Other vehicles on show include a 1964 Austin Mini van used by the AA, a lime green Mini owned by the hapless Mr Bean and an advertising version that resembles a giant orange.

A museum spokesman said: "The display was due to finish at the end of the summer but has been extended because it's so popular.

"People entering the exhibition hall spend a lot of time admiring the Minis before they move on to look at all the other cars."