Indeed - and the one thing we must do is engage with others or keep pushing out the boundaries - controlling predators on more and more landDissapointing to hear that argument raised by a member on here. It's increasingly pedalled by antis pushing for a ban on driven game shooting.
Do released game birds provide an additional food source for generalist predators in the UK. Of course they do. Is this the sole source of the increase in these predators and by doing away with driven shooting you'll restore the "balance". No chance. I would say most estates involved in gamebird releasing will be at the very least performing fox control. Many will be controlling corvid populations also.
As others have said, human activity, in urban, suburban and rural areas provides numerous, ample sources of food to maintain predator populations at levels far higher than the supposed "natural" levels. This, alongside human activity itself, can have a negative impact on the breeding success of other species in those areas.
You could end game bird release tomorrow and there are sufficient alternative food sources for the predators to switch to with negligible impact on their populations.
My view is that we have an obligation to address this imbalance wherever possible, which includes lethal predator control, not just in rural areas. The best you can hope for is to reduce the predator populations at key times of the year to a level where the pressure on the prey populations allows some breeding success. With the best will in the world, in the modern world we live in, that's probably as good as it gets.
The one thing we perhaps all need to do - is control predators more effectively and maybe the same can be said for deer. People like to "collect" lots of land and im sure they think they are doing an effective job - I look after maybe 500 acres in total - and that can keep me very busy - what with foxes - deer - rats - squirrels - corvids