Brilliant !! 27 Paving Slabs & 10 Bags of Sand. Heck! I'm guessing the former's about 5Kg and the latter about 25Kg; that's a lot of weight.
I see Alasdair beat me to the 'Ooh Matron' comment; I've no idea what he means of course!
Recent (ish) Estates I know of that still were a decent size were the Honda Accord and the BMW 5 Series. Pic borrowed from AutoTrader.
Some seriously impressive loading there with the Roof Beam and the Roof Box Paul. What is it with Estate car owners.... despite having some of the biggest cars on the road, we seem to be inclined to have Roof-Boxes too (I have one also) !
I googled the Hammond T-212 Organ, Zel, that's a size; old school Valves in something like that?