Boris Johnson is due in Moscow later this month. The Russia trip is the first by a foreign secretary in five years

Boris Johnson must be wary of spiked food, hacking, tricks to disrupt his sleep and honey traps during a visit to Moscow, the chairman of the all-party parliamentary group on Russia has warned. The foreign secretary is due to meet his counterpart, Sergey Lavrov, on Friday in the first visit to Russia by a senior minister in five years.

Chris Bryant, the Labour MP who chairs the parliamentary group on Russia, wrote an open letter to Mr Johnson after revealing that he himself had been the victim of suspicious activity on an official trip. Soviet-era tactics have been deployed against western politicians to give Kremlin figures the upper hand in talks, he suggested.

Mr Bryant visited Moscow and Nizhny Novgorod in January 2010 while a