Can anyone identify this vine?

Hi,
This vine is growing in my garden in Victoria. It's well established, with a thick woody stem. The leaves are in groups of 3. There are white flowers coming into bloom (not fragrant).
Can someone please tell me what it is?
Many thanks!

 

Clematis may be?

 

Thanks, I think you are right, I searched 3 leaflet clematis and came up with Clematis 'Spooneri' which looks just like what I have. The 3 leaflets and shape of the leaves threw me off the clematis trail initially. Thanks again