Eating oily fish rich in omega 3 fats may help prevent the spread of prostate cancer to other parts of the body, British scientists said today.

Researchers found that fatty acids, found in salmon, mackerel and fresh tuna, could stop tumour cells invading other areas.

The findings may also have implications for developing drugs to stop other cancers, such as breast cancer, from spreading around the body, the study said.

Prostate cancer is the most common cancer for men in the UK, but is particularly dangerous if it infects areas such as bone marrow. Omega 3 fats have already been found to be effective against contracting cancer, but this research suggests they might prevent a more aggressive form of the disease developing.