Hi @dopamino - thanks for your feedback and comments.
Yes there will be two specific tasks, voting and selection of winning answer.
Our team have decided to allow the same voting rules for topic readers and topic owners.
One vote will be allowed per answer, and will be voted on by clicking the 'Vote up' arrow.
On doing this the answer visually moves up above the previous answer and the number of votes will change.
For the topic owner, I had included the addition of a tick, in their view of the post. Clicking on this tick would enaable them to select this answer as the winning one.
My problem is, I don't' think this is obvious enough without some explanation.
The voting functionality is something I have already tested with a few users.
Previously the UI did not include the word 'votes', below the number of votes and the voting functionality.
Including this text makes it much more apparent that this indicates a voting system.
My initial solution of a tick to select the winning answer, is not obvious enough when tested.
Do you think a 'select winning answer' button on each answer would be cumbersome?