An "inspirational" 80-year-old grandmother is celebrating 25 years of volunteering at a charity shop.
Elizabeth Isaacs first stepped through the doors of Cancer Research UK in Palmers Green in 1989, determined to do something about the disease that had struck members of her family.
More than a quarter of a century on, she is being celebrated as the store's most dedicated volunteer.
The grandmother-of-nine lost her mother, step-mother and brother to cancer before she and her daughter Linda were both diagnosed with the disease more recently.
Linda has since been given the all-clear and Mrs Isaacs continues to receive treatment, but she has rarely missed her twice-weekly volunteer sessions at the charity shop.
She said: "I feel like I might be doing a bit of good. I chat to my customers about their problems and I've got to know them all over the years and the staff have always been very nice.
"I've seen lots of changes over the years and I've got used to the new tills and technology, but some days it likes me and some days it doesn't like me at all."
Volunteers at the Green Lanes shop held a celebration on Friday, and Mrs Isaacs received a letter of thanks from the charity's managing director.
Shop manager Maria Figueira said: "She's a total example to all of us. She's very punctual and totally reliable and even took the trouble to learn the new till systems recently.
"We depend on people like Elizabeth and it is so nice to have someone for such a long time. Our new volunteers learn a lot from her, which is fantastic, in fact we all learn from her."
Despite so many years on the shop floor at the charity store, Mrs Isaacs, from Southgate, says she has no plans to give up any time soon.
She said: "I don't know where the years have gone. When the time comes and they start hinting that maybe I should stay at home then perhaps I'll pack it in.
"But I still enjoy it and I'll be there for a few more years yet."