The Government has published its advice on military action in Syria, stating that the legal basis for any such action would be "humanitarian intervention".
It said "if action in the Security Council is blocked, the UK would still be permitted under international law to take exceptional measures".
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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.