Two women from Brighton have been arrested after allegedly damaging a field they mistakenly thought was growing genetically-modified oilseed rape.

About 40 people from across the South took part in the protest at a farm in Hilton, near Blandford, Dorset.

The women, both 44, were arrested for offences related to yesterday's incident. Seven other people were arrested.

Forty police officers took part in the operation.