Also, any removal of trees must be approved. See the Tree Preservation Orders: https://www.gibraltar.gov.gi/town-planning/tree-preservation-order
The four 5G masts were approved by the DPC. See Nov 21, 2019 meeting agenda: https://www.gibraltar.gov.gi/uploads/DPC/Approved%20Minutes/2019/Approved%20Minutes%2012-19-21November2019.pdf
It might be prudent to keep track of upcoming DPC agendas: https://www.gibraltar.gov.gi/town-planning/development-planning-commission-meetings