Im looking to hire a large estate car, my hire company has offered me the only type of estate car they have which is a citroen xsara diesel estate, has anyone been in one of these and know if it is a good large space in the back as l need to lug some boxes around in it?

Plenty big enough. Fold the seats down and you have even more space.

Fold the seats down and the space is large enough for the biggest mothering law :)

Its big enough just fold the seats down and you will have more space.