There are long queues for people trying to get on site at the Great Dorset Steam Fair.
The event at Tarrant Hinton near Blandford starts tomorrow but heavy showers have made it difficult for vehicles trying to get on and move around the site today.
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The offence is currently dealt with under communications legislation, meaning victims are not automatically granted anonymity.
Campers were greeted by cloudy and damp weather when the gates opened at 8am.
A murky start and a muggy one too with temperatures in the mid-teens.