Patsy Lees has conquered Everest four times — the latest climb when she was 80 — but even she was made to feel vulnerable when she was bombarded by 30 scam calls a day.

Lees, 82, from Surrey, first tackled the mountain aged 69 as part of a medical experiment studying the effects of oxygen debt at high altitudes, then returned for another three trips after she got the taste for adventure.

Yet when her landline phone, which she relied upon for contact with her family and friends, started ringing constantly with calls from scammers, she felt helpless.

Lees climbing Everest

“I’m quite a strong person, especially for my age,” said Lees, who travelled the world during her career as an in-flight nurse, caring for the sick when

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