People wanting to lower their risk of developing cancer by taking aspirin need to take the over-the-counter medication "for at least five years", according to the scientist who established the link.
Professor Jack Cuzick told Good Morning Britain the five year timeframe was why it had taken researchers "so long to see" the health benefits.
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Mr Blavatnik, whose empire includes the Warner Music Group, has an estimated fortune of £13.17bn according to the Sunday Times Rich List.
Find out what to expect from the weather if you are running in the big race in London or watching from the sidelines.
It will be a soggy start to the weekend and temperatures will drop making it feel colder than in recent days.