to 2292: Discovery

Thematic names are 1A/22 and 25/34, author of The Double Helix: A Personal Account of the Discovery of the Structure of DNA. Thematic phrases appear in the shape of a double helix with mirror symmetry around the grid’s central axis.
 
First prize Hugh Dales, Dysart, Fife
Runners-up P. West, Birmingham; Christine Twickel, Tidmington, Shipston-on-Stour