I've got 2 remotes, both did work fine, but then the battery failed on remote #2.
Not a problem - I put a new battery in remote #2 . . . and it didn't work, so I re-initialised as per the process below - no problem
BUT in re-initialising remote #2, it stopped remote #1 from working
So I re-initialised #1 - happy days
. . . . except that in doing so, it stopped remote #2 working 
Thinking I was losing it, I re-initialised remote #2 . . . and you can guess what remote #1 - it now doesn't work
I am guessing the problem is that the two remotes are being initialised on two different codes.
Does anyone have any thoughts on how I can initialise on a single code ?
[Initialisation process I used:- Key in Ignition, turned once then taken out. Press and held unlock button 3x]
Not a problem - I put a new battery in remote #2 . . . and it didn't work, so I re-initialised as per the process below - no problem
BUT in re-initialising remote #2, it stopped remote #1 from working
So I re-initialised #1 - happy days
Thinking I was losing it, I re-initialised remote #2 . . . and you can guess what remote #1 - it now doesn't work
I am guessing the problem is that the two remotes are being initialised on two different codes.
Does anyone have any thoughts on how I can initialise on a single code ?
[Initialisation process I used:- Key in Ignition, turned once then taken out. Press and held unlock button 3x]