The researchers said that most of the decline in the age group 55-64 is due to a significant reduction in the use of HRT in recent years. HRT is an important risk factor for breast cancer first identified in the 1980s.

Professor Peter Johnson, Cancer Research UK's chief clinician, said: "We've witnessed huge improvements in recent decades, with cancer survival doubling over the last 40 years. Cancer Research UK has been at the heart of the progress through investment in research into more effective radiotherapy, many new drugs and improved surgery.

"But it's also important to be aware of the signs and symptoms of cancer, so we can spot it early. Generally, the earlier cancer is spotted the easier it is to treat successfully, so know what is normal for you and if you spot anything unusual, get it checked out by your doctor."

Harpal Kumar, Cancer Research UK's chief executive, said: "The NHS faces a perfect storm over the next 20 years. The main reason for the rising number of cases is simply that people are living longer - and the greatest risk factor for cancer is age.

"At a time when the finances of the health service are being squeezed, it is absolutely crucial that health commissioners plan now for a massive increase in demand for cancer services, to ensure we provide high quality care to all.

"And as we develop ever more sophisticated ways to detect and treat cancer successfully, health planners must deploy resources more effectively to enable all patients to benefit from the latest developments and cutting edge new treatments."

Source: Cancer Research UK