back then, alexander litvinenko was a young fsb agent who claimed to be disturbed by what he saw. enko specialized in organized crime investigations but became obsessed with what he believed to be corruption within the fsb. crimes committed by the cops. he compiled a dossier, complete with flow charts detailing his allegations and presented it personally to the head of the agency. and the result was? >> opposite. >> reporter: surveillance on your family? >> exactly. >> reporter: an outraged litvinenko now did the unthinkable. he led a nationally televised press conference. a group of agents, several of them in disguise, claiming the fsb had become corrupted by russian mafia money. >> not only was it absolutely extraordinary, but as you see from the picture of that news conference, he did not have a mask. >> reporter: litvinenko even claimed he'd been ordered to assassinate a prominent billionaire, boris berezovsky, but instead warned him that his life was in danger. >> the essential motivation of this very simple man was his feeling that his country was being betrayed by the leader

we'll talk to the playwright behind a new drama about the poisoning of former russian spy alexander litvinenkoious injuries after a double stabbing at elephant and castle. police say they were called around 11:30 last night after a fight broke out between two groups of men inside the station. two men were found seriously injured in the street. the station has now been opened. the thames has a thriving seal population, according to new figures released today by the zoological society for london. it follows an annual census of the mammals on the river. the society says the increasing size of the colony is a good indicator that the thames and its wildlife are now thriving. we take the increase in seals as a positive sign of the health of the ecosystem. the thames is incredibly biodiverse, we really try to get the message out that it is full of life, it is notjust brown, there is plenty of fish and sorts of other exciting species. from today a "milkman for groceries" scheme is launching, alongside major brands, in the capital to tackle plastic waste. the delivery service, called loop, will allow s