I'd guess it's largely representative as the college as whole. I'd guess that London universities tend to have a greater proportion of international students than other universities, probably because of their location.
"We are proud to have over 4,000 international students on campus, from almost every country, ethnic and cultural group in the world."
(from International Students section of the KCL website)
Wikipedia estimates the entire student body as being between 19,300 and ~21,000 (there are probably more accurate statistics on that - but Wikipedia is quick and usually fairly accurate) - so that's significantly more than 7.5% . I'd imagine that the Law School's intake reflects that.