 Complete the following phrase:  In London, the sentry posts most recently remaining not behind any sort of fence were those at the Pall Mall entrance to St Jamess Palace. In December 2014, the Pall Mall sentries were moved to Friary Court inside the walls of the palace, while the Clarence House sentries repositioned inside the fence and at the entrance to the gardens. This was as a result of the increased threat of so-called lone wolf terrorist attacks, particularly following the 