A former cancer patient has told ITV News that it "never crossed her mind" she would not beat the disease.
Laural Johnson, who was treated for oesophageal cancer, also said she was "excited" by a new study from Cancer Research UK showing a marked improvement in survival rates.
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Thousands of people have linked hands on Westminster Bridge in a show of solidarity - one week after the terror attack in the capital.
PC Keith Palmer, 48, stabbed by Khalid Masood while on duty in the grounds of the Palace of Westminster last Wednesday.
Engineering firm CH2M won the £170 million contract but have pulled out of phase two of the project over alleged conflicts of interest.