Tickets sell out in day for A3 Hindhead tunnel walk
Tickets have sold out in a day for an event in which people can view one of England's longest underground tunnels.
Hindhead Together has organised the open day on 14 May when people can walk the 1.2 miles (1.9km) of the A3 tunnel in Surrey before it opens this summer.
Thousands of cars and lorries are expected to use the £371m tunnel on the London to Portsmouth route each day.
Funds raised from the tunnel walk are going to the Hindhead Community Fund, which helps local groups and charities.
When the event was planned, the steering group said the number of people interested in the tunnel open day had "far exceeded expectations".
Organisers had considered including cyclists and runners in the tunnel on the day, but the event was restricted to walkers because of the large numbers of people expected.
The open day has been planned with the Highways Agency, Balfour Beatty and Surrey Police.
The dual carriageway tunnel is set to relieve traffic bottlenecks in the area and keep 30,000 vehicles a day away from the Devil's Punchbowl - a heathland site which is a special protection area for wild birds conservation.