Christian Aid rally outside E.ON's headquarters.
Christian Aid director Daleep Mukarji says intimidating police tactics cannot be allowed to erode the British people's right to protest.
His statement followed the arrest of more than a hundred people believed to be planning a protest at a coal-fired power station in Nottinghamshire.
In a letter to The Guardian, Dr Mukarji said the mass arrests chimed with the experience of Christian Aid at a peaceful rally in March when supporters visited E.ON’s headquarters to protest against the energy firm's plan to build a new power station in Kent.
When supporters arrived at the Coventry offices, ‘we were alarmed to be greeted by a police officer using a video camera to film every single person taking part in our protest’, our director wrote.
‘This was intimidating and offensive, because it suggested that, merely by taking part in the wholly peaceful, lawful event, we were doing something wrong.’
With concerns now being raised at the policing of protestors at the G20 summit in London, Dr Mukarji commented: ‘Intimidating police tactics must not be allowed to erode people's right to protest.’