Start with permission, not a microphone

Recording an elderly relative's memories is one of the kindest things you can do for your family. Voices fade from memory surprisingly quickly, and a single half-hour recording can become the most treasured thing in the house. But the word that matters most here is safely — emotionally, physically and technically.

Before you record anything, have a proper conversation. Explain what you would like to do, why, and who might hear it one day. Ask directly: "Would you mind if I recorded us talking? It's for the family, and you can stop whenever you like." If your relative lives with dementia or memory loss, ask again at the start of every session rather than relying on last week's yes, and watch their face and body language as much as their words. If they seem uneasy, put the phone away and simply have the chat.

Set up the room before you set up the recorder

Choose a time when your relative is at their best — mid-morning, after breakfast and medication, is often ideal. Avoid late afternoon if they tend to tire or become confused.

Find the quietest room in the house. Turn off the television and radio, and don't sit in earshot of a dishwasher, washing machine or a ticking clock. Two comfortable armchairs set at a slight angle work far better than sitting face to face across a table, which can feel like an interview. Put tissues and a glass of water within reach, and make sure the room is warm enough — older people feel the cold long before you do.

Keep the kit simple. The voice recorder on a smartphone is perfectly good. Put the phone into aeroplane mode so an incoming call doesn't cut you off mid-sentence, and set it slightly to one side, a little nearer to your relative than to you. Rest it on a folded cloth or cushion to soften table knocks. Record thirty seconds, play it back, and check you can both hear clearly before you begin in earnest. Twenty to thirty minutes is plenty for a first session.

Ask questions that open doors, not tests

Good questions are open, sensory and specific. "Do you remember the war?" invites a shrug; "What did our street sound like on a Saturday morning when you were small?" invites a story.

• "Tell me about your first job — what did you actually do all day?"
• "Who was the best cook in the family, and what did they make?"
• "What did you and your friends get up to that your parents never found out about?"
• "What was the house you grew up in like in winter?"
• "Who was kindest to you when you were young?"

Ask one question at a time, then stop talking. Avoid "Do you remember…?" — it can sound like a memory test, and it invites a yes or no. Never correct a date, a name or a detail mid-flow; the telling matters far more than the accuracy, and gentle correction can make someone clam up.

Listen patiently, and let the tangents run

Silence is your friend. When your relative finishes a sentence, count slowly to five before you say anything. Most people will fill that space with the very detail you were hoping for.

Use small encouragements — "mm-hmm", "go on", "that's lovely" — rather than new questions. If a story wanders off towards a neighbour's dog or a holiday in 1962, follow it. Tangents are often where the gold is. If they lose the thread, hand it back gently: "You were telling me about the shop on the corner." And if they say "I've told you this before", answer warmly: "Tell me again, I'd love to hear it."

Watch for distress, and agree a way to stop

Some memories are painful, and a quiet afternoon can turn unexpectedly. Agree a signal beforehand — a word, or a hand on the arm — that means "pause the recording". If your relative becomes upset, switch it off, sit with them, and make a cup of tea. Don't push for details of grief, illness or trauma; you are a loving relative, not a therapist.

Afterwards, do something ordinary together — look at photographs, sort the washing, put the kettle on. Some people find revisiting hard memories a genuine relief and want to continue; let them lead, but never nudge. If they seem tired or muddled, end the session cheerfully and come back another day.

Keep the recordings safe, and make it a habit

The same day you record, copy the file somewhere other than your phone. Save it to a computer and a second place — an external drive or a cloud folder — so no single loss can wipe it out. Label each file with your relative's name, the date, the place and a note of the main topics, because "recording 47" will mean nothing in ten years' time.

Transcribe the best few minutes, or jot down timestamps of the stories you love. Share a short clip at a family gathering, with permission. Tell one other family member where the master copies live, and give your relative a copy of their own — many people thoroughly enjoy hearing themselves.

Above all, make it ordinary rather than a grand project. Half an hour on a Sunday afternoon, most weeks, will build you an archive no one else could ever make.