The cut BBFC 18 VHS by First Independent was compared to the uncut German DVD (rated FSK 18) by Laser Paradise.

The differences: 2 cuts = 10 seconds

The sequel to Mark Lester's The Class of 1999 was released in the UK in a shortened version on VHS. 10 seconds had to be removed to achieve the BBFC 18 rating. Years later, the film was uncut again with the same BBFC rating.

38 min
In the cut version you can just see the guy "Ice" burst into flames shortly after John set him on fire. The uncut version, however, shows another shot of Ice burning and screaming.
4 sec

38 min
The way the camera slowly moves away from John, while you can see the burning Ice in the background, begins earlier in the uncut version.
6 sec