Around thirty thousand people are making their way to Stonehenge this evening to celebrate the annual summer solstice.
One of the largest numbers of people will be gathering overnight due to good weather and the event falling on the weekend.
Police are asking visitors to enjoy themselves - within the law.
The officer in charge, Supt Gavin Williams says his approach will be open and friendly - but robust - in the face of any troublemakers.
Ahead of the Summer Solstice the National Trust reported that their campsite at Avebury was full within the first 30 minutes of being open this morning.
The Trust are now warning people to arrange their accommodation before setting off for Avebury.
People in Swindon are being asked for their views on the strategy to protect world heritage sites in Wiltshire.
The long term plan to protect Stonehenge and Avebury - two of the county's most important landmarks - will be revealed to the public at Swindon's Central Library. The consultation is an opportunity for the public to have their say on the plan - and comment forms will be available in the Regent Circus library.
A campsite for people celebrating the Summer Solstice at Avebury in Wiltshire opened this morning, and was full up within 15 minutes.
The site which is run by the National Trust opened at 9am. People are now being advised to arrange their accommodation before reaching Avebury.
Celebrations continue over tonight and tomorrow. The pagan festival marks the longest day of the year.
It's the summer solstice on Saturday and campers will start arriving today at Avebury stone circle in Wiltshire. The National Trust has set space aside for 100 tents for people wanting to mark the pagan festival. The solstice marks the longest day of the year.
Avebury Stone Circle in Wiltshire has been voted the second best World Heritage Site by critics, beating 958 others. Bob Crampton reports.