Heritage Open Day: Celebrating working people in creative industries with local authors, heritage craftspeople, storytelling, bell-ringing and choir. This bustling Autumn Heritage Fair pays homage to Grimsby's rich heritage and celebrates The National Year of Reading. Celebrating working people in creative industry as part of Heritage Open Days, Hammond House is delighted to be curating this vibrant, family-friendly Autumn Heritage Fair packed with storytelling and soundscapes in the beautiful and ancient surrounds of Grimsby Minster.