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This weekend the craft will make its latest journey - secured on a flat-bed lorry - to become the centrepiece of the Ruskin's Bluebird wing.

And, because it measured a mere eight metres across, the pod could be transported on a flat-bed lorry or hoisted into position by helicopter.

The huge artwork, which weighs around 25 tonnes, arrived on the harbour, carried on the back on a flat-bed lorry in October.

The monument was hoisted from its plinth in a park and dropped on to the back of a flat-bed lorry at a ceremony attended by city mayor Bat-Uul Erdene.