Great Britain

 Banknote Great Britain 20 pounds nd 2020 polymer unc

color violet - Queen Elizabeth II - Joseph Mallord William Turner, the "Painter of Light"
Turner's oil painting "The Fighting Temeraire" (National Gallery, London)

 Banknote Great Britain 20 pounds nd 2020 Polymer Aunc

purple color - Queen Elizabeth II - Joseph Mallord William Turner (painter, engraver and watercolorist), the "Painter of light"
Turner oil painting "The Fighting Temeraire" (National Gallery, London - number and series may be different - slight defects - product code P / 08973_B

 Banknote Great Britain 20 pounds nd 2020 Polymer unc-

purple color - Queen Elizabeth II - Joseph Mallord William Turner (painter, engraver and watercolorist), the "Painter of light"
Turner oil painting "The Fighting Temeraire" (National Gallery, London - number and series may be different - slight defects - product code P / 08974_B

 Banknote Great Britain 50 pounds nd 2021 Polymer unc

color red - Queen Elizabeth II - Alan Turing
mathematical table and formulae from Turing’s seminal paper “On Computable Numbers, with an application to the Entscheidungsproblem”;
Automatic Computing Engine (ACE) Pilot Machine (one of the first electronic stored-program digital computers), series of background images with technical drawings from the "ACE Progress Report";
ticker tape depicting Alan Turing’s birth date (23 June 1912) in binary code;
technical drawings for the "British Bombe" (machine used at Bletchley Park to break Enigma-enciphered messages during WWII) - product code P / 08975_B - the number and the serie can be different