We've just moved into a house with a decent size garden. There is an
extremely well established walnut tree (which has a conservation order
on it), which - as you can imagine - drops a considerable amount of
leaves, twigs, and walnuts.

I bought a 2500w flymo electric vac/blower since I had just so many
leaves to deal with, and this handles the leaves ok but the sheer
quantity of walnuts in the grass just depresses me. Raking is not
particularly effective.

Would a more "industrial" vac be able to suck up the walnuts?

Any other ideas?

best wishes
James