2 Pounds - Elizabeth II 4th portrait, DNA Double Helix

The double helix design was issued in 2003 to mark the 50th anniversary of Francis Crick and James Watson's published description of DNA's structure, work conducted at the Cavendish Laboratory in Cambridge using X-ray diffraction data produced by Rosalind Franklin at King's College London — a contribution controversially uncredited at the time of the Nobel Prize awarded to Crick, Watson, and Wilkins in 1962. The coin arrived the same year Franklin's role began receiving serious mainstream reassessment.