There's a problem in the Lothians at the moment because there is a delay in people getting their appointment letters. So sometimes people are getting their letter on the day of their appointment, or even after it's supposed to have happened, so those appointments are then wasted.
I'm on an Edinburgh Facebook group that mentioned it, and gave the helpline number to ring if you think you've been missed / aren't sure if you should have heard yet.
I rang this morning and the very helpful man on the phone gave me the dates for my jag and dh's, and the reference numbers in case our letters don't arrive in time. We're both late 50s and have appointments now next week. Such a relief!
The number is 0800 030 8013. You need to pick option 2.