Aha - is it working - thanks. Your were right the media was not attached, just generally in the library.
At the moment I am feeling overwhelmed with all the options and whilst I do develop software I am new to WordPress and web work is not my thing, so creating new templates is something I am initially hoping to avoid.
Whilst I don't wish to take up your time if you can guide me to the best approach that would be useful.
My initial needs are to present minutes for meetings. I want 'people' to be able to upload the minutes to the media library, categorise them (so let say 'minutes' and 'youth-club', but there could be minutes for many other groups too, hence why I like your tax_operator="AND").
So - all the above I believe I can do.
My next step is presenting them: I want to put each document on a separate line a bit like a table/grid with a number of columns showing (probably) caption, date (date entered by uploader, not date of upload, i.e. the date of the meeting the minutes were for, so this might be a custom field) and maybe other stuff.
I suspect I may need to look at creating markup template to achieve my presentation, but I am not sure whether there is an out of the box 'column, row' option and how I might define where to get the data for the cells from...and if there are many documents offer a 'next, previous' set of links.
I know - I don't want much - but just confirmation there is no 'out of the box' solution and the fact I need to use a template would be good feedback.