Thanks for that Gibbo, that was the magic answer
The thought of battling up (and down) alpine trails with itchy eyes and a streaming nose was not appealing.
I'll try Beconase, but ironically enough, when I've nasal sprays before, all they've made me do is sneeze!!
Have you tried the Hayband? It's an accupressure thingy that goes around your arm near the elbow. It doesn't look great, and the fit is a bit neat if you've muscly arms but it does seem to do the trick without any drugs whatsoever.
Haymax is also qute good, but you have to keep re-applying it and that can be annoying.
Here's hoping we both have a sniffle free trip! i'm off on a bit of an Alpine road trip on Sunday
