My brother Simon and I arranged to do this 52-mile cycle around the streets of London several months ago, before Mum's death, but although neither leukaemia nor lymphoma were the cause, we're doing it because our family, like many, has been touched by cancer. And anyway, we like cycling. Please support us if you can.

I should mention that our efforts here are small compared with those of Dad, who as treasurer of his local village Cancer Research UK group in Devon has helped raise more than £110,000 over ten years.

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