I had my first experience of telling one of my work colleagues that they are not invited to our wedding. It kind of went like this:
Her: have u got ur dress yet?
Me: Ye I got it ages ago.
Her: Can I come and have a peek at it?
Me: Its over at my mums (20 miles away)
Her: Ah right, well as long I get an invite so I can see it..
Me: Um.... you might have to wait till the photos, as we are only inviting close friends and family, don't take it personally. Were not inviting anyone from work.
Turns out she was fine about it, but it just makes me feel so bad when people just presume they are invited, and I have to tell them that they aren't, That was the first of many I expect. Is there a nicer way of telling people they arent invited?