Sixt is a long running rental company with considerable experience in renting out commercial vehicles, they have an age restriction that is lower than most for vans (often 21 years old is sufficent).
Please note: not all the above vans may be available at all depots.
Details on these types of van is available here
Sixt is one of the largest rental companies in Europe, with a well established reputation and a modern up to date fleet of vans they offer a reliable premium service. And with numerous rental depots throughout europe it is sometimes possible to take their vans abroad. Sixt was originally founded in Munich in 1912, and is part of the Sixt group and its subsidiaries.
They offer van and car rental at over 3500 locations across 90 countries, with over a 120 in the UK and over 20 in London alone. They also offer flexible rental terms on their vans if you need to hire a van for longer than normal. Vans can be reservered and prepaid for both online at sixt.co.uk and over the phone on 0844 248 6620, or even through an iphone app. Sixt have numerous extras available as well, in addition to simple rentals, they also have rental gift cards available for luxurious cars, express reservations, third party trade reservations and more.