Well my spare key stopped unlocking the Rangie 2003 , I replaced battery in the fob and also when through the reprogramming process but no joy so it must be a circuit board fault.
So I ordered on of these on ebay. A later look flip key. Its seem of quite good quality from an aussie seller

It was an easy process to remove my old transponder chip from the old key fob and inset it into the slot provided on the flip fob. a couple of minutes in the Rangie had the new flip programmed and ! now have a working flip key. I just need to go to a lock smith to get the key cut.
Cheers, Mario

LAND ROVER 3 BUTTON REMOTE FLIP KEY FOR RANGE ROVER L322 VOGUE HSE 433mhz | eBay