A huge section of hull for aircraft carrier HMS Prince of Wales arrives in Rosyth later, where finally assembly work will be carried out.
The 8000-tonne section weighs more than an entire Type 45 destroyer.
Asembly work will begin on the Prince of Wales next month.
Iain Stevenson is BAE Systems programme director.
He tells us the arrival of the hull section - known as LB-03 - is a milestone:
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