Can you recommend a car which fits 3 child seats/boosters in rear AND has a large boot?

[cupsnakes]

We have an audi estate which is great for 2 children and labrador in boot.
With third baby coming I don't think we can fit 3 child seats in the back so ds is going to have to sit in the front and I am going to have to squeeze in the middle of the back seat when we are out as a family.
Is there another car I should be considering for the future?
Some of the people carriers look quite good but I need a LOT of boot space for dog + pram + sundry.

Sorry, this is the actual review, I clicked on the wrong one!

Hi, we just got our new S-Max as we have 3 in the back, have a Britax Evolva 123 which is massive, a booster and a Britax kid which is a high back booster. Bought it cor review in Whatcar said is the best car for 3 in the back, also boot is huge, and still good size with 7 seats up too.

We bought a citroen xsara picasso when had third child. It has 3 adult-sized seats in back and a large boot. Compared to other cars of it's type it's quite reasonably priced. Had it nearly 2 years now and very pleased with it.

Call Britax about whether you are allowed to ahve 3 seats in the back.They are so helpful.