These plans should not be sent to IFPS. If you're not flying the airways, don't send them the plan.
Sorry Hippy,
Here are some quotes;
From the IFPS Users Manual;
"Submission of Messages
Note The procedures outlined in this Section should not be considered as taking precedence over those published in National Aeronautical Information Publications (AIPs)."
From the UK AIP
http://www.ais.org.uk/aes/pubs/aip/pdf/enr/20110.PDF
The thing won't let me copy/paste, but it does says that if you are flying IFR in the IFPZ (the term has been replaced by Flight Plan Message Distribution Area) you must address your FPL to both IFPS Units
"All flight plans and associated messages for IFR/GAT flights entering, overflying or departing the IFPZ shall be addressed only to the two IFPS addresses for that portion of the flight within the IFPZ."
Send the plan to London FIR, the LARS units that will be handling your flight and London Military if you are going to require a service from them in the middle air.
And you will get an excelent service from them. That is until the day that everybody is doing it, and the forecasted traffic counts in the sectors start to look very slim when compared with the actual traffic load.
IFPS only knows airways, nothing else exists.
Sorry again, Hippy but that one is a just BS.
Tell me, what airways file the guys going, for example from LFPG to LFPO, and AFR does it all the time? One item in the route field; DCT. What about flights into most UK military airfields? The end of the route in the FPL, invariably ends with DCT either to some navaid or to the field itself. How do you plan when flying in Lisbon FIR coming from the Atlantic bellow 245? DCT.
Cheers