Marina Litvinenko, the widow of murdered Russian dissident Alexander Litvinenko, has said she hopes the inquest into his death will reveal the truth.
"It is so difficult to live all this life without this truth and without this information. It's difficult for me, and our son, and for our friends."
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Extracts released by 10 Downing Street suggest Mrs May will say the UK will not settle for a "half-in, half-out" policy.
Milder for most of us