The security guards, who try to keep demonstrators off the site, swapped allegiances after allegedly witnessing an attack on a protester by a guard. They blamed other heavy-handed tactics employed by the security company for their defection.
One of the three, 20-year-old Brette Shepherd, said he got on well with the protesters and defected when he was reprimanded for talking to them.
A Friends of the Earth spokesman said it was delighted and added that the new recruits would be star speakers at a protest march this weekend.
The guards' decision followed a day of more protests. Rush hour traffic in of Newbury stopped when around 30 protesters climbed on to low-loader trucks and tied themselves to machines being taken to the site.Reuse content