The do have a TRO on this land but there are strict rules upon which land they can apply a TRO to. From what I've read so far they must 'Control' the land.
If I take the case of a car park a few hundred meters from this one again owned by a private company they have parking eye manage their car park, but Parking Eye are member of BPA and have to follow a totally different appeals and courts process to obtain their fines.
So what's the difference between them and the council, do manage mean they control the land and if so what's the difference with the council and private eye managing the land. The council could monopolise all of the car parking and add revenue to their coffers if it was that simple.
Their enforcement is stronger in law.