A quick check of the manual
http://motobavaria.com/docs/k1300s.pdfdoes indeed support the fact that services are annual unless the bike is doing more than 10,000km (6000 miles in real money) per year so the question is, when was the last service and what was the mileage? The next service should happen either, not more than 12 months after the previous service or, not more that 6000 after the previous service, whichever is the sooner.
Off topic:
Brian - I'm flying on Saturday morning so don't know for sure yet that it will be OK. What I have discovered is that breaking the ribs at the rear (as I have done this time) is sooooo much easier than breaking the ribs at the front/side, which is what I did last time. Although the break score was 5 this time, and only 2 last time I did some rib damage, sleeping, moving, breathing etc. has been easier from the start and is improving noticeably quicker than last time. (Although sneezing still feels like I've just been impaled in a very long, sharp stick!!) If you ever get the choice as to where the rib break(s) will be - choose the back