Each morning, Mr Ritchie climbs out of bed, pads over to the bedroom window of his modest, two-storey home, and scans the cliff. If he spots anyone standing alone too close to the precipice, he hurries to their side.

Some he speaks to are fighting medical problems, others suffering mental illness.

Sometimes, the ones who jump leave behind reminders of themselves on the edge – notes, wallets, shoes. Mr Ritchie once rushed over to help a man on crutches, but by the time he arrived, the crutches were all that remained.