We have stopped at York Rowntree on numerous occasions before and have never had any complaints, however on this stay we did not get the expected night time peace and quiet. We were on one of the central pitches, separated from the row behind by a hedge. It was a warm evening so we had plenty of roof vents open, we decided to bed down at about 11.30pm only to find that the occupants of the unit behind the hedge were still sat outside drinking and chatting, I believe with another couple. This noise went on until about 12.30am. We were surprised that these people were not asked to keep quiet earlier by the site staff and to avoid any confrontation we did not communicate with them ourselves.