After no offers of help, I have done it myself. Had to move 3 victorian chimneys to a new sight. Then get out Garden Vac and hoover up. Then get Fatsia out of existing pot, which I couldn't lift. Took it out and carried up the steps across the gravel bed to the new huge container. In the bottom of this beast, I put bio yogurt pots and broken up lumps of styrene (from next doors new cooker). Covered it all with some old horticultural fleece. Then I had to carry the large multi-purpose sack down garden, and very carefully plant it up.
This took me a couple of hours. Finished - no had to go and clean up the other side of garden were the smaller container lived. The Fatsia is now its nice shady new home. 2 chances. But I am pleased with myself.
Still lots more to plant up, but they are smaller. Mrs Bouquet