LEVC - You are an arrogant fool and, what is more, you are demonstrably wrong.
Rule 25 of the Rules of the Air Regulations states
(1) Within controlled airspace rules 27, 29 and 30 shall be the Visual Flight Rules.
(2) Outside controlled airspace rule 28 shall be the Visual Flight Rules.
Nowhere in Rule 27, 28, 29 or 30 is there any reference to navigational technique or to the use of GPS. Consequently, your statement that it is "ilegal to fly VFR with GPS as primary mean of navigation" is entirely incorrect, both factually and grammatically.
You are making the very basic error (typical of the inexperienced) of confusing CAA guidance with the law and you would do well to take heed of your, somewhat offensive, advice to BEagle and refresh your knowledge of the regulations, which is currently sadly inadequate.