People.............. Drum roll please......
My cat..... Went through the cat flap..... On his own.... With the flap done and everything.

For two weeks. I have had the flap open. He has gone through that fine. But close the flap. And nooooooooo.
So I started to open it a bit when he went out. And making sure he got used to the flap on his head and back.
And today. He did it on his own. Bless him. It is more of a tunnel as it is in the conservatory wall. And the width is fairly thick.
Now. If I could only get him to come in the house using it as well. I will be there. But. Hey. Don't rush it 