That's true to a limited extent. There are a lot of UK medical schools, so some are potentially harder to get into. Brand names like Oxbridge are probably harder to get into. I know for a fact that Oxford's medical school takes very, very few international students, and it is very unlikely that those who were rejected by their own country's medical school will be accepted by Oxbridge. Even then, those people who are accepted by a UK medical school are a minute percentage of people who were rejected by their own country's medical school, i.e. there are probably a lot more people who are rejected by both UK medical schools and their own local medical school, and given the limited number of places the competition is still probably very fierce.
There are a total of 586 places for international students(assuming 7.5% cap). But the number is less because of schools like Oxford.
The competition is not a walk in the park. For oxford's case, the applicant to offer ratio is 1:100. The interview to offer ratio is slightly better, at 17:200.
http://www.medsci.ox.ac.uk/study/medicine/pre-clinical/statisticsYeah, those are probably the exceptions rather than the norm. The point made was that Asian Unis are harder to get into Oxbridge. It's unlikely to be true. Most asian unis have pretty low entry requirements as compared to Oxbridge, and they do this so that people have a chance to be university-educated, which is why the grade requirements seem very lenient.