Flybywyre

This the front of the garage and the tiles are identical on the rear.

Thank you all very much for your replies and yes, I have cut back some Ivy which was on the tiles. Unable to get a full roof picture due to bushes in the park at the rear of garage. A visual inspection from the park indicates that everything appears to be symetrical. I have taken some pics of the eaves and the last tile does not seem to be any lower to the guttering than the normal on the front side of the garage, which I thought a bit strange. As you can see from the pics there are other cracks, which I had not noticed until I moved some bushes to take the pictures.

A gap appeared on the roof of my garage last year and seems to have gotten bigger. I am concerned that the whole roof might come cascading down given time or alternatively the wind may get under there and bring it all down. Can anyone recommend a filer that will bond it all together? Thank you in advance.