AnthonyB,
Thank you for your advice. In the days before cars, those gates would have opened onto a street or passageway leading to a street. Now, houses demolished and a car park.
The students passing through was never seen as a problem but we have to solve all the long-standing problems I described and that can only be done with a secure boundary. We can't have the students leaving gates open, which will inevitably happen.
We rent the premises and car park, so, I suppose we need to talk to the landlord to check the points you made. Also, we need to bite the bullet and talk t