Welcome Darryl & Nina.
If you use the search facility you should find lots of useful info on how to jack up your Eriba.
The best bet is a trolley jack and this is what I use at home as to carry one is heavy. For on the road you are very limited and a good bottle jack on a sheet of ply is your best solution. Unfortunately you are limited in suitable jacks as you have little height under the axle (your jacking point) and the ground. Search out a Coram/Land Rover jack. This is about the only one that will fit in this confined space, give the lift you require and be stable enough.
Colin