B190 what you refer to is commonplace.... (FL310 northbound until out of MAD airspace).... with which CFMU have no doubt made your company aware with their various CTOT slots; file an internal report and your Nav or Perf manager should be able to default your plog to refelect the lower level in future.
Kiltie, thanks for the advise but I have already been down that road, spoke to our flight planning dept. etc over a year ago concerning this. We now have a blanket 'low level restriction' through Madrid on the plogs, even if it doesn't happen all the time.
The point is though....... why do they accept a flight plan at FL370 when it's common place to get much lower than this ? Flight planning is exactly that - to help you plan for the flight and decide the right fuel.