Got mine fitted by Towequipe in Nuneaton (by thier mobile fitting team) it was the swan neck type with single electrics and it cost £140 ish!
NO bumper cutting whatsoever! Looks tidy too, electrics tucked up out of the way!
If you phone them and ask if they cut the bumper they will either say, yes, no or don't know depending who you speak to but when its fitted, it does miss the bumper!