Complex sentence: When the strike broke, the rudder was replaced and welded into position and the ship left Puerto Belgrano in early April 2006, returning straight back to Portsmouth via Lisbon and to drydock again for further engineering work on the rudder and stock.
Split into simpler sentences: When the strike broke, the rudder was replaced and welded into position and the ship left Puerto Belgrano in early April 2006. She returned to Portsmouth via Lisbon and to drydock again for further engineering work on the rudder and stock.