Pick: #397 , The Banknote Book: B206
England. Bank of England. 2015-2021 Issues. 20 pounds type 2021. Date: June 23, 2021. Dimensions: 146 x 77 mm. Watermark: Shadow image: None. Material: Polymer (Guardian). Colors holographic stripe. No security thread. Printer: Thomas De La Rue (TDLR). Front and back: polychrome printing predominantly brown, yellow, green, red and pink. Description of the front: Bank of England seal. Tintern Abbey window. Coats of arms. Seated Britannia with shield and laurel leaf. The Queen's portrait in the see-through window. Omron rings at left. Tactile feature. Hologram. Raised dots. Ultra-violet number. Portrait of Queen Elizabeth II at right. Guilloche patterns. Texts in English: "I promise to pay the Bearer on Demand the sum of Fifty Pounds" in text at centre. Signature: Sarah John. (Chief Cashier). Description of the back: Portrait of Alan Turing (1912-1952), based on a photo taken in 1951 by Elliott & Fry" (Photographs Collection at the National Portrait Gallery, London). Silver foil patch. Red foil patch. Series and numbering printed in black, green and red. Introduction: 23.06.2021. Technical characteristics: Bank of England: The new £50 note.