London Underground Poster Flower Market by Tube Kay Gallwey. Original vintage London Underground poster - The Flower Market by Tube Sunday mornings at Columbia Road Shoreditch nearest stations Old Street, Shoreditch - featuring a colourful floral image showing a flower seller with people at the market and various flowers in the foreground, the text and London Underground logo at the top. Columbia Road Flower Market by Kay Gallwey one of a series commissioned by London Underground. Very good condition, minor creasing, small tears. Country of issue: UK, designer: Kay Gallwey, size (cm): 152x102, year of printing: 1987.