Upgrade of an existing telecommunications base station consisting of the removal of 6 no antennas and the installation of 6 no antenna, 2 no antenna to be placed on new tripod frame with internal works to the existing cabinets and ancillary development thereto on the rooftop of London House for enhanced service provision. Top height of masts is 21.5m AGL, length of pole mount masts taken by themselves is 4.9m