Singles Not Albums

I have a few thousand mp3's that I ripped from my CD collection over the years.

The files are named as Artist - Title

The tags for Artist, Title and Artwork are populated as I filled these in as I ripped them which worked fine for my needs.

Now though I've started using KODI for media at home and would like to populate the Genre and Year fields.

I've looked on Discogs at a few tracks and find that some have multiple genres which I'm fine with.

Also I'm happy with the year being the release year of the album that the track appears on.

What I don't want though is the album field populating so that I end up with hundred of maybe single track albums.

Can this be done?

In the web source script you can unselect the field for ALBUM and save only the other fields.

Sorry I'm being dim here, where is that?

is a web source script.
In the dialogue to assign the found data to files, there is a checkbox for each field with which you can set whether you want to set that data.

These are my actions:

Highlight a file that needs Genre and Year populating

Select Discogs from the Tag Sources Menu

I get a requestor: Search By: Album

I Click Next and get a list of 100 results, none of which are the from the artist of the mp3 I originally selected

I click next and get a window titled: Adjust tag information with some details but to an unrelated artist / title

See the documentation how tag sources work:

AFAIK there are also ways to search discogs by title year and discogs id.
Use the source that suits your needs best.

I'm finally getting somewhere, I've gone through quite a few files but there are some niggles.

Is there any way to filter the search results to remove anything except the UK?

Can I limit the results to just Master Releases?

See this thread about master releases:

If you are searching for artist + title, you will frequently end up with more than 100 matches for popular songs. In this situation you may want to refine the search and supply more search criteria, but the standard discogs searches only support two search parameters.
For this use case you can construct your own custom search script for example to search for artist + title + country + mediatype by using the export script provided in Export configuration to build Discogs Custom Search Commands.
For example searching for
Bee Gees - New York Mining Disaster 1941
has more than 100 matches, whereas a search for
Bee Gees - New York Mining Disaster 1941 - UK - single
with the above suggested custom search produces only 6 matches.

Thank you, this is exactly what I originally wanted.