RyanAir is still a safe airline, whether they give their pilots strict limits on fuelling or not there has not been one FR flight that has run out of fuel.

The way this way explained to me (by a RAF fuels specialist) was that at the point that an aircraft is coming in to land at its intended destination, even if the flight has been bumped up the landing list due to a fuel shortage on board, it will still have enough fuel left to abort the landing and re-route to another airport under emergency circumstances unless they have already been redirected or there is exceptionally bad and totally unforeseen weather.