An interesting idea for those operating large van fleets: do you need to own your entire fleet? Not that I would recommend you steal vans, but perhaps van hire could be an option. A recent post on Fleetnews suggested that some van fleets are larger than they need to be.
The idea is that a fleet size should be dynamic and able to react to different conditions. A busy few months? Rent some extra vans. Forced to reduce outgoing due to the recession? Keep your fleet size down to a minimum.
The article also suggested that this would keep down CO2 although this isn't necessarily the case unless you are actually operating all your vans all the time. The main benefits are more likely to be in keeping costs to a minimum by only using what you need when you need it.