Overview

• England’s festival will open historic houses and hidden spaces at no cost, with thousands of events offering tours, talks and behind‑the‑scenes access.
• Coventry lists more than 50 participating venues and adopts an architecture theme for 2025, spotlighting landmarks such as St Mary’s Guildhall and Coventry Cross.
• Warwickshire plans 50‑plus free openings and guided walks, naming sites including Kenilworth Castle, Baddesley Clinton and Packwood House, and the district council calls it a record year.
• The National Trust is offering free access to its properties throughout September alongside related programmes in Wales (Open Doors), Scotland (Doors Open Days) and Northern Ireland (European Heritage Open Days).
• Several events require advance reservations via the Heritage Open Days website, and visitors are advised to check individual listings for available times.