2D,
As I thought. Theory (Brussels Route) and Practice (the short way) being two different things.
Does filing DCT points "fool" the machine at all? If not it doesn't matter as long as you get "something" filed.
The people at PARIS (LN Sector) often ring and ask if it's ok to send a Deauville outbound north via SITET, and we usually have no objection, particularly if its at FL100 and below. Perhaps it's worth asking Deauville before you depart if you can route via SITET?
I can't see them objecting because there's usually nothing at all to conflict at the lower levels, and they have to make a call anyway, either to BREST ID if you go NW, or to us on S18 at Swanwick, so no "extra" work for them.
Even if your FPL doesn't get into the UK system my assistant colleagues are very good at getting the details from the French and cobbling something together in NAS so we have details.
rgds BEX