==="Queen Elizabeth"===The first steel cut for the project, in July 2009, signalled the start of construction of Lower Block 3 at BAE Systems Clyde, where production of Lower Block 4 started in January 2010.
Construction of Lower blocks 3 and 4 began at BAE Systems Clyde in July 2009 (the first steel cut for the project) and January 2010 respectively, while construction of the bow Lower Block 1 was carried out at Appledore, North Devon and were completed in March 2010.