Edinburgh - Five environmentalists who attached themselves to a BP oil rig off the Shetland Islands during a week-long protest decided to end their demonstration yesterday, Greenpeace said. Four of them were arrested when they left the rig. They left the Stena Dee because of "logistical constraints" and safety reasons, Mr Robbie Kelman, oil campaigner for Greenpeace, said.9954651 Mr Kelman told PA News: "We intend to apply considerable resources to the campaign in future, and we are still pursuing our legal challenge against exploration." - (PA)