I use 12 lb BS Big Game line for my barbel fishing. I tested some using weights and it broke at about 18 lbs (I have seen similar results on the Internet). It has never let me down. So your 25 lb BS will be good for 30 lb + 😀 Only problem using line so strong is that if you get snagged by a passing boat on the Ouse you lose the whole reel of line unless you have a handy knife or scissors.
