Say I want to include 3 #tags on a page do I need to put them in individually and post them as three separate 'comments' or can I put them in en bloc as one 'comment' e.g.
You can put them all in one comment as the system picks up multiple tags from one comment. For example look at this page where I added two tags to a page where medals had been awarded http://talk.operationwardiary.org/#/subjects/AWD0000bnt and you will see the system has picked up all three tags from this page under the "tags" section top right.