The wife of a father of two who died after an attack at a party hosted by smartphone company BlackBerry says his death is "completely and utterly devastating".
Phil was the most genuine, likeable and generous man you could ever hope to meet. He was a perfect husband, son, and father to our daughter aged eight and son aged five. His death is completely and utterly devastating.
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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.