GLS
Please actually read other people's posts before you go blagging off about them, especially the third paragraph of my last one
FYI, I use GPS every working day and have done for years. My job would be much more difficult without it. I am very much pro GPS, as is anyone with any experience of it. Where on earth have you got the ridiculous idea that I or the CAA "want to do away with GPS?". I merely pointed out the UK regulations, that's all.
I am aware of the RAIM error system and have to sort it out with FMS but of course not all GPS units alert the user to it. As I said, from what I have gleaned, it's not so much the pro users that the CAA is concerned about.
BTW, without radio navaids I would be very interested in your personal IFR backup plan in case your aircraft's GPS failed.