We have been really disappointed with the infotainment system in our latest Skoda. Now it has got worse as the SatNav has lost all the favourites and does not retain the history.  It is out of warranty so assume it will be expensive to fix. Has anyone had the same problem? Can any help?

Couple of things come to mind...

1. Check you are using the same user in the car. Every now and then mine does what I assume is some sort of cold reboot and I come back in as the Guest User - with none of my favourites etc showing. Changing user to my own login gets me back to where I was.
2. Software version of the Infotainment system. Some earlier versions would lose favourites and history from time to time and no way of getting them back. Ideally you v.1941 or v.1969. As it's out of warranty I am not sure how your local dealer will deal with a request to update it, may include it with a service. However, there is a DIY option (at your own risk). The pinned thread in this forum has details of DIY updating to 1969.

I have tried to change user but that didn't sort the problem. Thanks for your help I will have to decide whether to risk it!

I had this problem when I got my Octavia.  It was fixed when I insisted the dealer upgrade the software to the then latest version (1941).