DFC, I was going to retire gracefully from this debate but ...
If e) doesn't apply to the flights you are talking about, which paragraph does?
As I mentioned before, you have to understand the distinction between a filed FPL and the limited info needed by an ATC unit to give clearance (or not) through a particular piece of airspace that is along your route. It is sometimes difficult to map ICAO regs to a national system but I'm afraid that on this occasion it doesn't fit what you think should happen.
The present ICAO rules do not specify that a FPL should be sent to aerodromes along the the route FOR ANY FLIGHT. You may not like the rules, they may be outdated, they may not fit many of the types of operation that take place today, but that's what they are and the UK doesn't differ to my knowledge. So accept it.
By all means try and change the rules through the appropriate channels but don't try and tell the rest of the world - and some of the people who have taken the trouble to answer you are very experienced in the way that ATC works - that they are wrong simply because you think the rules are wrong.
Now I'm bored with this and I will retire gracefully.