The list includes all R18s from the first hardcore R18 of 16th August 2000 through 2003.
Thereafter only cuts of significant interest have been included
Thanks to Sergio who now maintains the complete list of R18s on his site 

Hardcore R18s Cuts Latest 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

K

by Vince Vouyer (Nice 'n' Naughty)
Dillie Ray, Bobbi Star
Submitted in 2008, running time 234:29s
Cut by 2:38s: Two cuts were required to remove scenes of urination during sexual activity

by Kelly Stafford
Monik,Amber,Sabina
120m 36s. Cuts of 15m 15s were required to remove sight of urolagnia (in this case urination into mouth and onto face) and aggressive and violent sexual behaviour (eg face slapping, hair pulling, buttock punching, forcible restraint during sex) 

by S. Duffy
Lady Butt,Bit Tit DD
70m 4s. Cuts of 0m 40s were required to sight of urolagnia, (urine on tongue and man licking urine off floor and toilet seat).

by Nacho Vidai
Frank Gun,Hacan Serbes
110m 53s. Cuts of 0m 7s were required to remove, during sexual activity, sight of man restricting woman's breathing.

by Disanto
Anjali Kari, Tequila Woods, Chloe B, Natalie Heck.
149m 4s. Cuts of 0m 20s were required. The cuts were Compulsory. Cuts were required to remove the sight of choking

by Disanto
Anjali Kara, Chloe, Passion, Lilly, Dorris.
127m 0s. Cuts of 12m 10s were required. The cuts were Compulsory.
Cuts required to scenes involving indecent exposure and outdoor sexual activity in a public place in the UK (breast exposure, vibrator use, male genital exposure and fellatio),

by Nacho Vidal
Stella, Mary, Inga, Monica, Gabrielle, Franco
81m 19s. Cuts of 0m 20s were required during sex scene when man presses woman's neck down with one hand and places his other hand over her mouth.

by Not Known
Cut required to remove sight of bound and gagged woman having wax dripped over body and genitals and, while bound and gagged, being engaged in further sexual activity.

Not known
Chantel, Amanda, Lucy, Lena, Danni, Anni.
120m 16s. Cuts of 0m 13s were required. The cuts were Compulsory.
Compulsory cut for R18 required to remove abusive dialogue reference to woman losing her virginity at 15

Not known
Not known.
90m 51s. Cuts of 5m 37s were required., some or all of these cuts were substitutions. The cuts were Compulsory. Compulsory cut required to sight of bound and gagged woman unable to withdraw consent contrary to BBFC policy in order to attain an R18 category.

by Angie Dowling
El Capitano,Chastity Angel
79m 54s. Cuts of 0m 46s were required to sight of a breakable object (a glass thermometer) being inserted into vagina and jiggled.

by Jorg Andreas
Not Known
103m 12s. Cuts of 0m 1s were required to remove sight of abusive scenario (bonnet being slammed over top half of naked man in the context of sexual activity).

by Kylie Ireland
Kylie Ireland, Julie Knight, Sandra Romain, Jamie Brooks, Tyla Wynn, Dominica Leoni, Barbara Summer
135m 21s. Cuts of 4m 0s were required. The cuts were Compulsory. Cuts required to scenes of potential harm in a sexual context (in this case, oxygen and blood supply being obstructed) and to humiliating and abusive acts (gagging cause by forced fellatio)

by Kylie Ireland
Katrina Kraven, Kylie Ireland, Lauren Phoenix, Jassie, Kimberly Kane, Venus, John Strong, Michael Stefano, Anthony Hardwood
134m 35s. Cuts of 5m 14s were required., some or all of these cuts were substitutions. The cuts were Compulsory. Cuts required to abusive and potentially harmful acts during sex (in this case breath restriction combined with slapping and gagging in fellatio)

by Kylie Ireland
Hayley Paige, Jayna Oso, Mandy Bright, Anna Nova.
140m 42s. Cuts of 8m 20s were required. The cuts were Compulsory.
Cuts required to remove abusive and potentially harmful sexual activity (restriction of ease of breathing during fellatio resulting in coughing and gagging, and aggressive slaps to the face)

by Kym Wilde
Kym Wilde, Anna Amore, Randi Ravage.
60m 23s. Cuts of 20m 1s were required., some or all of these cuts were substitutions. The cuts were Compulsory. Cuts required to abusive activity (in this case, the whipping and slapping of two women to the point of genuine pain/distress and fighting/throat holding between two women) in a sexual context

Hardcore R18s Cuts Latest 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z