become violent. the bbc‘s duncan kennedy explains what happened. it really has been an extraordinary few hours ending with this special forces raid on a tanker in the solent behind me here. that raid involved four helicopters with teams of what's called special boat service, sbs, special forces. they're based about 50 miles, about 70 km down the coast here. and they landed on the deck of this vessel in their four helicopters and used what was described as "overwhelming force" to retake the ship. they detained seven individuals, and we're told the whole operation only took around nine minutes, so a very quick operation. an extremely highly proficient professional service, the sbs. very well—known in many parts of the world. they're based about 50 miles, about 70 km we're also told that no members of the crew were hurt during this operation. it was authorised by the home secretary and the defence secretary earlier on this evening