Like Brian, I have just carried out the procedure on a 49JL9000 TV purchased from John Lewis last week. Now works correctly, so I will let both JL and LG Customer Services know!
Edited: P.S. Although the magic remote now seems to operate correctly, having updated its (the TV's) software successfully, clicking on 'Check For Updates' in Settings still results in 'Unable to check for updates', which indicates that the updated software/firmware hasn't improved everything!