UKH

Re crampon and ice-axe use. Given that 9 months may separate the last time I had to use either (and some years the gap is longer), what's the best way to refresh?

Usually I rely on youtube and then an easy day out or two. If I don't regularly use knowledge, it just leaks out of me. 

Indoor ice may suffice?

Just stick them on and hope for the best? First time that I put crampons on was on a very snowy Striding Edge. Not hardcore I know, but interesting all the same. 

I find the exact same problems with Scottish summers.

Sorry.

​​​​​​Some sort of bung or plug perhaps?

I try and do the same as you for a day or so before launching myself up some grade IV, it soon comes back. For me the Navigation in winter conditions is more important, as crampons and axe use has become intuitive, were as navigation requires more concentration and practice over a longer period. Early season conditions in Scotland usually allow for a few days of skill refreshers!

M

Take up alpine climbing to get a summer hit of snow / ice?

Surely crampon and ice axe use are as intuitive as cycling, walking, running, skiing, swimming and any other form of locomotion?

Tell that to my hole riddled winter trousers.

Few of those are intuitive.