The Foreign Secretary has told ITV News: "We must never give in and will never give into terror.
"British foreign policy can never be dictated by terror. Murder can never be excused by any political grievance.
"This has shocked the country and the whole world."
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Staying blustery for the next 24 hours with strong winds driving some rain, sleet and snow from west to east tonight.
The mother of murdered Boris Nemstov's girlfriend is worried her daughter is being treated as if she had something to do with the killing.
Student Charlie Mann was jailed for 16 months for the attack on his mother at their family home while high on Meow Meow.