Jan. 15 (UPI) -- Russia expelled a British diplomat Thursday, accusing him of spying for MI6 amid worsening relations between the two countries. The Foreign Office said it was "carefully considering" its response to what it said was a baseless allegation. The allegation from Moscow is that the unidentified diplomat was an undercover agent working out of the British Embassy in the Russian capital. The Russian Foreign Ministry said he had been given 14 days to leave Russia and had his