How will my IFR flight outside of controlled airspace by handled?

[dont overfil]

Hi CT,
No FPL required for Scotland - England FIR. It is required for flight to southern Ireland or Europe.
As IO540 says there is usually no point in filing a FPL for VFR or IFR under FL100.
It's a trip I do regularly. I can explain on Sunday if you are going to the dinner.
DO.