Those in charge of the Arctic penal colony where Russian opposition figure Alexei Navalny was detained and killed will be banned from the UK and see their assets frozen under new sanctions announced by the Foreign Secretary today.The UK has frozen the assets of six Russian prison bosses in charge of the Arctic penal colony where opposition leader Alexei Navalny died. The sanctioned individuals will also be banned from travelling to the UK. “Those responsible for Navalny’s brutal treatment should be under no illusion – we will hold them accountable,” UK Foreign Secretary Lord Cameron said