Factual error: When the ship is being launched a champagne bottle is smashed against the hull. Harland & Wolff, like many shipbuilders, did not smash champagne bottles against the hull.
Factual error: The Sergeant-Major of the artillery section Corporal Bins and his men are briefly attached to has two of his medal ribbons round the wrong way. He has up the Victory and British War Medal ribbons, when they should be worn BWM and then VM. A mistake an experienced senior NCO would not make.