In the absence of a shotgun (and licence and sufficient experience and skill and a suitable environment to use it in) and a vet with euthanasia drugs would be 60+ minutes away (and perhaps want paying the maybe £180 emergency call out fee) what would those of you who think this is vile and inhumane, actually do?
Assuming it was relatively unhurt, would you fancy your chances against the teeth and jaws of a wild carnivore in severe distress and pain in trying to cut it free (and release it illegally)? I'd like to think I'd try that but if a fox is caught up in netting, the chances are that you're not getting it set free without sedating it - which I'd put money on vets wouldn't do having realisee you intended to release it (again, this is illegal).
It's likely injured. Who exactly is going to treat this wild and scared carnivore with the big teeth and no trust in humans?
It's more than likely severely injured and severely distressed. Are you going to make it wait an hour (could be more like three) in pain and distress and getting worse for a vet to come out, somehow get a needle into a vein (!!!???) and pay the best part of £200? If you're lucky and in rural countryside somebody might have a shotgun but they'd be say 45 minutes away.
If I were the fox, I'd pray either I could get myself out, or a human with either a gun or a heavy object and a good aim made it quick for me. Rather that than wait in pain and distress.
It's not pretty - death usually isn't, particularly not with wildlife. It was quite likely the most humane way that was available quickly at the time.
I read the tone of his tweet as more "fml, my day is going just bloody great, I've just had to dispatch a wild animal who was trapped in netting, horrible job to have to do mutter mumble grumble".
I think the only thing he is guilty of is being a twit not realising it was a bad idea to tweet about it.