You can drive most common panel vans such as Mercedes Sprinter, Ford Transit, etc.
These vans typically come in 4 weights
2.8 tons – Normally slightly smaller and lighter.
3.5 tons – Medium and large wheelbase versions.
4.6 tons – Normally has 2 wheels side-by-side on the back, often mini-buses.
5 tons – rare heavy duty versions.
The weight is the maximum the vehicle is allowed to be when on the road, not what it actually weighs when empty.
Your license allows you to drive the 2.8 and 3.5 ton vans.
Almost all panel vans are 3.5 t, but you can easily check them.
Most of these vans weight 2.1 tons when empty, which allows you 1.4 tons to add the conversion, people, fuel, etc.
Then on the road the vehicle must not weight more than 3.5 tons.
So you can consider almost all of the panels vans our there, just check the listing.
Hope this helps.