But before the additives are added it isn't EN590, its Diesel fuel to a lesser spec and EN590 isn't a fuel, its a specification with minimum and sometimes maximum limits for each specified area, an example would be the cetane number that has to be a minimum of 51 but your van would be much happier at 54 - 55.
It's a bit like saying a van is a van and they are all the same regardless of who makes them, as we know there are good vans and not so good vans with even the good ones being bad sometimes.
HGV Diesel engines are completely different matter as this is my specialist subject, with larger displacements they are much lower revving and spend a much larger percentage of their time at a very high duty cycle, the same rules do not really apply although they do to a certain extent as some of the benefits of Premium will be there although these wouldn't justify the extra cost.
As to bio, you should only go for what is approved for your engine and nothing else, interestingly EN590 is already a B7 fuel and has been for around 2 years now so you wont be able to get B5 for a road vehicle anymore.
Interestingly diesel fuel has a shelf life these days and is a also now classified as a flammable liquid, both a result of the introduction of Bio which basically partially turns to water & has lowered the flash point of Diesel below the flammable liquid trigger point. There are still tanks with WW2 fuel on some military bases and that fuel is still in good condition and very useable - modern diesel wouldn't be, even after 5 years.
What we should or shouldn't use in our vans isn't a debate really as we can put anything we want in our own vans, just don't complain if you buy cheap and then have problems.