Climate change protesters are aiming to shut down a power station on Saturday, despite danger warnings.
Energy company E.On has warned climate change protesters to stay away from one of its power stations where a demonstration is due to begin.
About 1,500 protestors are said to be at the Camp for Climate Action outside Kingsnorth power station in Kent.
About 1,500 people are said to be preparing to shut down Kingsnorth power station in Kent to protest against plans to build new coal-fired units.
They plan to reach Kingsnorth by air, land and sea - including with a flotilla of rafts crossing the River Medway - in attempts to cut it off.
An E.On spokesman urged the activists to keep outside the gates to prevent the possibility of serious injury.
Police say the Medway is a busy tidal river with dangerous mudflats, and it would be "folly" to try to cross it.
Protesters say they will approach Kingsnorth "by air, land and sea."
'Determined'
A "four-pronged" attack to reach the power station includes a flotilla of rafts crossing the River Medway.
The Camp for Climate Action is a week-long protest at Kingsnorth, where a new generation of coal-fired plants is planned.
The flotilla of themed rafts is part of a "four-pronged" attempt to reach the power station.
We have repeatedly and publicly warned of the folly of trying to cross the Medway ACC Gary Beautridge Kent Police
A second group of campaigners plans to lead a procession to its main gates, while a third aims to reach it through undergrowth, and a fourth aims to make a "secret air approach".
A second group of campaigners plans to lead a procession to its main gates, while a third aims to reach it through undergrowth, and a fourth aims to make a "secret air approach".
Dangers
We're very concerned about the long-term sustainability of the planet Kevin Smith Climate protester
E.On spokesman Jonathan Smith said: "If you look at a power station clearly there are many areas where there's large scale machinery working, they are very tall structures.
"If you do not know what you are doing you could really very seriously injure yourself at a power station and we do not want that to happen," he added.
E.On said it had brought in extra security advisors to prepare for the protest, with the safety of the people involved of paramount concern.
Other warnings have come from the police and the Maritime and Coastguard Agency.
'Determined'
Police say the Medway is a busy tidal river with dangerous mudflats, and it would be "folly" to try to cross it.
The Medway harbour master has refused permission for the regatta under river byelaws amid concerns over safety.
The Medway harbour master has refused permission for the regatta under river byelaws amid concerns over safety.
And Colin Ingram, of the Maritime and Coastguard Agency, said anyone falling into the water could get hypothermia within 45 minutes.
And Colin Ingram, of the Maritime and Coastguard Agency, said anyone falling into the water could get hypothermia within 45 minutes.
But Camp for Climate Action spokeswoman Jessica Glynn said that would not deter protesters from taking to the water.
But Kevin Smith, who is taking part, told the BBC they're very determined to go ahead with the protest.
"Nobody is allowed to participate if they have not had full health and safety training and are not wearing life jackets," she said.
"We're very concerned about the long-term sustainability of the planet," he said.
"The last thing we want to do is injure ourselves or anyone else.
"Obviously safety is paramount in our preparations but E.On really can't go ahead with this. It's going to take us to the edge of an ecological catastrophe."
"We are still planning to go ahead with it, people have been preparing for this for a long time. We are determined to reach Kingsnorth by land, sea and air."
Camp for Climate Action spokeswoman Jessica Glynn added: "The last thing we want to do is injure ourselves or anyone else.
Energy company E.ON said it had been preparing for such an attempt for many months, and had brought in extra security advisors.
"Nobody is allowed to participate if they have not had full health and safety training and are not wearing life jackets."
It said it hoped to keep Kingsnorth operational, but its first priority was ensuring the safety of everyone involved.
Policing row
Policing row
Up to 1,400 police officers from 26 forces around the country have been drafted in to police the event since it officially began last Sunday.
Up to 1,400 police officers from 26 forces around the country have been drafted in to police the event since it officially began last Sunday.
On Thursday, Kent Police had stop-and-search powers extended to the whole of the Hoo peninsula.
On Thursday, Kent Police had stop-and-search powers extended to the whole of the Hoo peninsula.
They said the decision had been taken because officers continued to find people carrying potential weapons.
They said the decision had been taken because officers continued to find people carrying potential weapons.
But two MPs and an MEP - Norman Baker, Colin Challen and Caroline Lucas - have said the powers undermined civil liberties.
But two MPs and an MEP - Norman Baker, Colin Challen and Caroline Lucas - have said the powers undermined civil liberties.
Since the protest began, about 22 people have been arrested, 14 have been charged and two have received cautions.
Since the protest began, about 22 people have been arrested, 14 have been charged and two have received cautions.
E.ON plans to build two new cleaner coal units on the site, which it claims will be 20% cleaner.
Plant plans
Medway Council has approved the scheme, which would be the first coal-fired power station to be built in the UK for 24 years, and the final decision will be made by the government.
The action is part of a week-long protest at Kingsnorth organised by Camp for Climate Action.
If approved, E.ON said the power station would be operational by 2012 and would provide energy for 1.5 million homes.
They are campaigning against plans to build two new coal-fired power stations - the first to be built in the UK for 24 years.
The plans have been approved by Medway Council but the final decision rests with the government.
E.On said the plants would be operational by 2012 and would provide energy for 1.5 million homes.
Will you be taking part in the protest? Send us your comments using the form below.
Will you be taking part in the protest? Send us your comments using the form below.
