From my exp.
KLMUK, now cityhopper, (Yes deliberate) have a habit of getting the early slots into SPL. So the first flights are not regulated by CFMU, or indeed by SPL, sorry AMS.
KLM, in my 15 years exp. get better treatment at AMS, an Airporrt that has (CFMU approval) control over it's own traffic.
The last guy I pleaded with for 1hr on my 7hr slot delay for Crew Hrs, in the middle of summer, was born in '42.
Hello trade off, can LHR, LGW or MAN get away with 'green issues'
NO, they have to take every overfly, and do a %% good job.
AMS, SPL, cut the politics. You rely on us for your revenue?
You guys n girls may be good, your constant r/way changes as quotas expire, are dangerous.