Well a couple of things. When KLM withdrew their EMA-AMS service it was a surpirse to most as the demand always seemed to be their.
At the time BD also offered 3 flights a day with DC9, with interlining service through AMS.
These days the WW service is twice daily with a 737, but no interlining. Maybe KLM see the opportunity to reintroduce their worldwide connections from Nottingham.
Time will tell.