Being an estate it should be fitted with Nivomats from new. Providing the towed weight does not exceed the kerb weight you should be fine. Keep your speed steady and no more than 50mph on single carriageway roads, or 60mph on Motorways, observing any lower limits of course. You should find the car a dream when towing. Do not overload the van and ensure that it's noseweight is close to 50-75kgs. Spreading the load over the floor is fine but keep to the nose-weight limit. Is it a single axle van or twin axle one? Keep van tyre pressures to the van's handbook figures and increase your rear tyre pressures by about 4-6psi when towing. The van and car should present a level look when on the move.
All the best, Peter.