Aneurin Bevan University Health Board says it will now be taking legal proceedings to take back possession of the car park at Royal Gwent Hospital in Newport.
It says it had asked a group of travellers from France, who have parked caravans in a section of the staff car park, to leave by 4pm today - but they are still on site.
More top news
There'll be clear spells overnight which means temperatures will fall. Setting us up for a dry start to the weekend, but it won't last!
Watch the men who have been making history by taking Wales to the quarter-finals of the European Championships.
Chris Coleman's men have an army of fans all wearing red today. Are you dressed up for tonight? Send us your pics!