Oz,
Yep, and my husband then moved to annual at about 2.5 years (his choice) so if you continue to show good 6 monthly results, this may follow. However I think in consultation with your GP you can stay on 6 monthly if you really want to. We didn't want to, and are happy with annual now, but many do check each 6 months. Its perfectly normal for 14 months out. cheers