I'm thinking of an IFR flight from Perth (EGPT) to Norwich. I glance at the standard route document reveals a route that is mostly outside of controlled airspace and indeed the way I intend to fly it will mean that the Newcastle CTA will be the only controlled airspace I will need to negotiate (the standard route is unacceptable due to the high MEA on some portions of L602). My question is which ATC units along the way, apart from departure and destination obviously, will know about my existence? Will Newcastle for example know?
As niknak says, "the east coast main line" is very nicely served, at least Mon-Fri 9-17. Newcastle, Teesside, Leeming, Linton, Doncaster/Humberside, Waddington. Seamless, with or without a filed FPL. I would say no point in filing one, unless you want it for S&R, or it's an advantage for Scottish.