Visit the National Trust for Heritage Open Day on Saturday 13 September.

As part of Heritage Open Days this year, the National Trust will be opening over 300 of its properties for free on Saturday 13 September. Across England, Northern Ireland and Wales there will be opportunities to see conservation in action, learn about traditional skills and take behind-the-scenes tours or view rooms not usually open to the public.

Here’s a selection of the events on offer:

Chirk Castle, Wales

© NTPL / Matthew Antrobus

Visit the exhibition ‘It’s Your History’, look up your ancestors on the servants’ database and help fill in the missing pieces of the castle’s past. Discover life behind the scenes and below stairs with the 'Hidden Servant Stairs' tour- a chance to see many of the hidden staircases and parts of the castle not usually open to the public

Berrington Hall, Herefordshire

Have a taste of life below stairs in this elegant Henry Holland house and see the footman’s bedroom and servants’ staircase open for the first time.

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Tyntesfield, Somerset

© NTPL / Andrew Butler

Watch the conservators at work – and give them a hand - as they tackle the delicate cleaning of the mosaic floor in the stunning Gothic chapel.

Nunnington Hall, Yorkshire

Join the volunteers for the day, meet and greet visitors, and discover what it is like to work in a historic country house.

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Penrhyn Castle, Wales

© NTPL / Matthew Antrobus

Pick up some specialist housekeeping tips from the experts as they demonstrate the cleaning of antique upholstery, woodwork and brass, in this spectacular 19th-century fantasy castle.

Kingston Lacy, Dorset

Watch inventory photographer, Simon Harris, as he captures collections on film and learn the practical use of photographing your valuables in case of flood, fire or theft.

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Trelissick Garden, Cornwall

© NTPL / Stephen Robson

Enjoy a tasty treat as the cooks prepare and serve Trelissick old-style apple pie, made with traditional apples from the garden’s own orchard.

Sizergh Castle, Cumbria

Take a look behind the doors of the library, with its magnificent 17th-century tapestries, and the family chapel; two private areas rarely seen by the public.

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Petworth House, West Sussex

© NTPL / Stuart Cox

View some hidden architectural treasures of Petworth, see fascinating 17th-century buildings in the Woodyard for the first time and discover the story behind the house's very own fire engine shed.

The Workhouse, Nottinghamshire

Have a peek at some of the many items found during the restoration of this atmospheric 19th-century workhouse and find out how the project to document them is progressing.

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Arlington Court, Devon

© NTPL / Matthew Antrobus

Experience the new wing of Arlington’s internationally important carriage collection, meet the volunteers and hear their stories, take a tour of the Victorian garden with the gardener and learn more about clothing conservation with demonstrations from the conservator.