i couldnt have killed them either. how do you kill a mouse (except drowning which is sad) without getting bitten?
thats a good price. might get once.
Microwave them
Seriously...
Feed them purchased legal mouse poison bait whilst you have the captive audience everyday till they snuff it.
Just don't be cruel to them & don't use your own home made recipe .
re:- Moving them to another area and releasing them.
The Wild mammals enacted legislation of a couple of years ago makes that illegal with mind numbing financial and confinement penalties if caught
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Now you've declared it here on the internet perhaps it is not such a good idea to broadcast as there will almost certainly be some anti or troll with nothing better to do hiding in the weeds gathering info .
Feed them poison rather than release them back into the wild in order to avoid antagonising antis or trolls?
I think you need to re think what you're suggesting. My solution, while not being ideal, is far more humane than being a spectator while captive mice die slowly from poisoning. I think that any prospective anti or troll, is far more likely to be on your case than mine.
Foxes are regularly trapped and relocated by animal welfare groups and although I haven't and wont be checking the regs that you've quoted, I think that you'll find that such restrictions may be directed towards the release of non native species such as North American Mink and Grey Squirrels.
In the meantime, what I think is my common sense approach of giving these pesky mice the chance to p*** off somewhere else to live, leaves me with a fairly free conscience and that, doesn't even take in to account the warm glow that I feel at having possibly given the local owl population a helping hand in the process.