Complex sentence: Helen Rollason was the first female presenter of "Grandstand" and after being diagnosed with cancer helped raise over £5 million to set up a cancer wing at the North Middlesex Hospital where she received most of her treatment.
Split into simpler sentences: Helen Rollason was the first female presenter of "Grandstand". After being diagnosed with cancer, she helped raise over £5 million to set up a cancer wing at the North Middlesex Hospital, where she received most of her treatment.