Many people think that employment rates are lower in the UK than in other countries, but the data show the reality. I made a chart and put it in dropbox at:
https://bit.ly/MBAemployEmployment rates for MBAs are, on average, over 90% only in the countries where there are either very few international students (China, India) or where international students tend to come from former colonies with the same mother tongue (Spain, Portugal).
In other countries, the average employment rate is between 83% and 90%, which is still quite good. The difference is largely explained by the percentage of international students, since they are harder to place.
However, top 100 schools in some countries on average over-perform. The trend line on that chart spotlights them: France, Italy, the Netherlands and the UK. Of course, many international students in France already speak French, and Italy and Netherlands' scores reflects the fact that only one excellent school is represented in those countries: Bocconi and RSM. In that context, the nine UK schools look attractive.
PS Some countries under-perform, most obviously the chart highlights the USA, but also Australia, Canada, Ireland, and South Korea.