I can confirm that not many have left WMU at least on the groundschool side in the last year or so - it becomes widely known in the industry if many are doing so. The schools know a lot about each other due to staff movements, job interviews, and the CAA contact groups, such as the CGIs meetings. I certainly don't remember many people being approached to work in WMU, only the one in that time, and that due to a retirement.