i Work the sector your flight would route through so i can assure you we do get aircraft filing via saski at 110 and below and provided it meets the requirements of our instructions the appropriate strips and radar display will be produced. However for whatever reasons best known to others sometimes a perfectly good flight plan will give us strips and radar info via redfa?? go figure.
If everything is ok the flight data is sent straight to brussels and we transfer you without the need for co ordination. (the initial part of the airways at saski etc east of the fir boundary although in brussels and dutch airspace are delegated back to certain london sectors)