Evacuation route not communal part

[Guest Suz]

I wonder if anyone can assist. I live on the ground floor of a block of flats, the front door is not inside it leads to the outside space and communal landscaping. The back of the property is a terrace and is separated by planters to the neighbours terrace and has been this way since it was built 15+ years ago. We are now being told that building management want to remove these planters to make it an emergency exit route. I own the full terrace as per my red line plan, it is not a communal space. Can anyone tell me if this is even legal? They are saying a risk assessment has now highlighted the issue but haven't provided any copies of it. Thank you 

[AnthonyB]

If you own the land and there is no easement allowing others access for emergency or other purposes then they cannot legally do this - the fire regulations do not override property law in this instance. You could grant them a deed of easement to allow this for which you could charge a fee.

I'd ask to see the risk assessment as well.