Generally speaking the RCBS scales (the LIght and the Pro) tend to work well for standard loading. In that I mean that they do hold to their stated "within .2grs" accuracy.
The issue with them many times is that they tend to drift over time, during a long loading session, and often perform better when "warmed up" (turn them on 1/2 hour before use).
<shrug> Most shooters, especially hunters, will never notice the variance since most shots are with in a few hundred yards, and most can't hold well enough to shoot the difference.
Now perhaps the drifting issue may be moot in the UK due to the difference power voltages and cycles(?); I really don't know. What I do know is that strain gauge type scales like the RCBS electronic scales can be a real headache inthe US if the power is dirty, or someone is using it around fluorescent lights.
Either way, for the average shooter, it's a scale that will work fine for most work.