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
Michael Wheeler, 22, admitted causing Sophie Taylor's death by dangerous driving during an alleged car chase.
Cloud will thicken from the south, with mist and fog reforming in many areas towards the end of the day. Maximum temperature 9 deg C.
Property tycoon Peter Morgan allegedly strangled the mum-of-one Georgina Symonds with a ligature in January 2016.