<sod >Foreign Secretary Boris Johnson will appear before MPs this morning following news of the mass expulsions, which areÃÂÃÂ expected to prompt an angry response from Moscow.< eod>< sod > Foreign Secretary Boris Johnson will appear before MPs this morning following news of the mass expulsions of Russian spies from the US and other allies,ÃÂÃÂ to show their support for Britain over the Salisbury nerve agent attack.< eod>