Released with the title "Mutant II" the British video was so heavily shortened that the BBFC 18 Rating hardly makes any sense. This is a comparison to the US video version (R-Rated).

46.14
When the dead Bodi falls into the frame the British version contains a cut: Michael sees the corpse, screams and slams the door.
3 sec

62.30
Michael keeps walking down the stairs. He finds a flashlight. He accidentally flashes the dead guy whose face is completely deformed. Michael appalls. After that he flashes the dead guy, again, and has a closer look at him. Here, the British version sets in again.
44 sec

63.31
When the monster jumps out of the helmet Michael boggles and lands on the ground backwards. He slowly gets up, looks at the dead guy, once again, and sees the blood splattered wall. He slowly walks backwards and accidentally touches the dead guy with his hand. He finds a big canister. Now, the alien attacks and the British version sets in again.
63 sec

81.14
The alien breaks through the gas station attendant's face.
1.5 sec

81.21
We see the gas station attendant and his deformed face.
2 sec