Cadbury Trebor Basset, a subsidiary of Cadbury Schweppes, says the growing availability of liquefied petroleum gas (LPG) at petrol forecourts was one of the reasons for its decision to use the vans.
The group's food divisions department will use the new vehicles on a two-year/70,000 mile contract hire arrangement through Lombard Vehicle Management.
Keith Williams, account director at the food services division of Cadbury, said: 'We were recommended to try LPG-powered Combo vans by our fleet manager and quickly found them to be more economical and more driveable than the much larger vans we had been using.
'The Combos have proved to be much easier to handle, to park and to manoeuvre than our previous vans.
'A number of the vans will be used within the London congestion charge zone and so we anticipate making savings on road charging as well as on the fuel.'