Thanks Kirk
I do understand how the CR works, and have it pretty much sorted for this client.
I'm having the code insert the date and day of the Month from the image EXIF data, which is working fine. I just need the suffix placed automatically as well. Doing it with a manual code replacement for each day would be too slow to contemplate. I'm not sure why the client is insisting on this, but I suspect he is a grammar nazi/perfectionist.