From the chaotic regions of the Cryptosphere, The Natural Philosopher
wrote on Fri, 11 Jul 2003 11:59:52 +0100:

Hmm. I'd be tempted to see if a hired concrete mixer would be gettable
in through the house, and then just get bags of sand, cement, and
ballast and do it the hard way.

What about a pump over the top of the house. May be a bit expensive
for a conservatory, though.
--
Hugo Nebula
"You know, I'd rather see this on TV,
Tones it down" - Laurie Anderson