First off so sorry it's taken me so long to respond, have a new baby so simming time is much less frequent these days.

Appreciate you looking into this Michael and your replies. I never even knew what an AIRAC cycle was until you mentioned it but after your post I went to Navigraph and downloaded FMS data update and I also went elsewhere to update navaids in FSX think therefore I'm on 13.08 update.

As I'm sure you know this hasn't solved the Edinburgh VNAV approach issue for me (and its good to know its not just me that's experiencing it).

Like you said I can use Heading select to get me on intercept with the ILS, and I have done in the past but it just kinda bugs me (no pun intended) that I can't use vnav.

Is this just s general fault with LNAV or is this something specific to my home airfield EGPH? Does your LNAV intercept work ok at other aerodromes?

Finally is this something I should raise with captainsim for a fix?

Cheers
Alan