Nixter,
I'm a french man.
My "not so good" english isn't the native language of an english man. (The spellCheck button help a lot)
Suppressors are used in UK, even and mostly with air guns, as they use really powerful .177 or .22 air rifle.
Here, they are not so common. For civilian, they could be use only at the range (no hunting) and good one are quite expensive (the very best aren't for civilian).
I've updated my profile, things will be more clear.
Respectfully,
Pascal.