I spent a bit of time trying to figure out any potential problem areas when the concrete is delivered.  Unfortunately the outbuilding is about 40 feet from the roadside so I'm going to have to wheelbarrow the 1.25m^3 into the room...arrrrgh!  Oh well,  the concrete guys reckon on about 25 barrow loads.  That's about 120kg per run - wow!  I set up the route with planks and various bits of timber and created a level track from the boundary to the room.  I loaded up the barrow with, I estimated, about 125kg and did a few test runs along my track which didn't seem to bad - though after 20 barrows I may not be quite so sure!!  The worst part of the run is where I have turn right into the room, which is quite tight along a narrow alley at the back of the house.