Christine and Alan.
Here is another way to level your T/A take a measurement between the centres of you wheels, make a note of this.
Now what you do is take two of the full sizle fiamma levelling blocks and place them dowm down back to back, space them out to the distance between your wheels,get your van somewhere near where you want to be and place the fiammas in line and reverse up over the first one and then you second axle will be going down ,get the other arf to watch spirit tell her to let you know when level.
If you need to have this made clearer get the mods ie Parksy to give you my email address (its ok)
Regards Sir ROGER ( Thanks Steve in Leo)