Hi Gavin,
you could probably compost it, either worked into the main heap a little at a time or on it's own with a little amber nectar to help it along, although you've not really got enough for that. If you save it up until grass cutting starts in earnest then I guess it could go onto the heap with that, the sawdust would dry out the grass and the grass would give nitrogen to the sawdust.
Otherwise a path surface?
BTW -if you're that Gavin welcome back. If you're not welcome aboard :)