Very well done finding that.
Strange why Fowlers u.k. website parts book shows it as 5LV for an 05. Possibly all the 05 bikes were built with the down pipe outlet with the tubes in them for the cat in the silencer for Europe, including u.k. bikes, but because, we do not measure bike emissions, the replacement is specified as the straight through pipe 5LV. Only my twisted thinking! The main thing is they will all fit the bikes perfectly.