Snakes & Ladders 1-50 Full Solid
https://www.thermoplastic-markings.co.uk/shop/tmg003-50sf-snakes-ladders-1-50-full-solid-2010
https://www.thermoplastic-markings.co.uk/web/image/product.template/2010/image_1920?unique=4c0f250
Internal Reference:
TMG003-50SF