In reply to Sarah_Clough: As a guess: There are two standards for ropes, a CEN standard (European Union) and then the UIAA international standard. There is little point gettting the UIAA approval if you already have CE approval.
They are both identical for all the drop tests, impact forces etc., but I beleive there is a different standard for sheath slippage. Someone else may know the exact details of the difference.
However, all ropes easily surpass all the current (both) standards - the only exception might be the recently introduced sharp edge test (quoted by some manufacturers)which only a few ropes pass but that is not statuatry requirement and is more a manufacturer driven sales point than a properly defined test/standard.
Any rope the is legally on sale is 'fit for porpose'. The details are just cost/weight/durability/handling/impact force etc.
HTH