Britain and Russia brace for showdown over nerve attack on ex-spy
![](https://r58b8e.a2cdn1.secureserver.net/wp-content/uploads/2018/02/worldnewsdyil2auoc8za.gif?time=1719987041)
LONDON (Reuters) – Britain braced for a showdown with Russia on Wednesday after a midnight deadline set by Prime Minister Theresa May expired without an explanation from Moscow about how a Soviet-era nerve toxin was used to strike down a former Russian double agent.