Lease states park can only be used for PUBLIC RECREATION nothing else

According to a FREEDOM OF INFORMATION request the lease allows the PARK to be used for PUBLIC RECREATION only nothing else

BUT MANCHESTER METROPOLITAN UNIVERSITY use the park for private events like the FRESHERS FAIR which is actually a private event but when it comes to public events like last yeas "LIGHTS UP DISCO" they locked the park one hour before the event

SO its being misused by the lease holder but the city council will here non of this. WHY?