In reply to Aeneas:
>
> I found the 45 came in far too small (toes at the end) and the 46 far too big, both with considerable heel lift.
I may be talking rubbish here, but when I bought my Oly Mons, i had this exact problem, only to find out when I went to the Alps that these boots are sold in half sizes on the continent but only full sizes in the UK.
My Spantiks are a full UK size, but I'm pretty sure they are also available half sizes (outside the UK).