Cheers mate, i thought pretty much the same. One of my volunteers at the Rockery is a top guy in his local angling club and has to deal with the EA and this sort of stuff on a daily basis....i'll see him tomorrow.
To the OP...i'm happy to take the fish but get some dollar for them if you can...
If you want to donate them, i'm happy for you to put them in the Rockery opposite Preston Park where they will spend their days with the other koi, orfe, carp, roach and terrapins. They will be looked after.