In December of last year, Boris Johnson became the first U.K. foreign secretary to visit Russia in five years. Now, following claims and counter-claims about the Salisbury nerve agent attack in the U.K., his visit seems unlikely to be repeated soon.

The legal industry has played its own role in the unfolding drama, with U.S. President Donald Trump’s lawyers drawn into the investigation into Russian election interference, and Conservative MP and foreign affairs committee chair Tom Tugendhat going so far as to call on lawyers to consider the “moral decisions” they take when they engage with Russian clients.