I commented on these a few weeks ago. Over many years I have had issues with them such as not being sent one (very rarely do they make them when you leave) and appointments being changed due to unforseen circumstances.
I have just had a new one! A few minutes ago I got a reminder text that is slightly different to the appointment letter. Fortunately the only difference is that it is half-an-hour earlier - I wonder if it really is? If I phone it will take ages to get through so I will just go at the new time and take a magazine or book with me.
Anybody else had this?