Last House On The Left = 31 secs (according to the BBFC AB made an additional 13 secs of edits to one of their releases to smooth over some of the cuts).
I Spit On Your Grave = 7 mins 2 secs (inc substituted cuts. The print is the same as the initial 2001 release, rather than the 2003 pan/scan version).
Nightmares In A Damaged Brain = Who knows? The print submitted runs
96 mins 2 secs and is the R-rated version. How much is missing is anyone's guess. The BBFC would pass the full version without any problems now.