Unwanted camera shake when player follows spline

Hi I have a game where the player follows a spline.
There is a lot of unwanted camera bounce happening.
Can anyone advise how to stop this hapenning ?
I had thought that it may have been linked with the rough terrain he was running over but its the same on a smooth surface like this road.
A screen capture can be seen here (9 secs onwards):

If its of any help this game will eventually be used with a VR headset so I have removed the ability to pan vertically with the mouse - you can only pan around the character horizontally.
I’ve attached shots from my blueprints.

When I try to view the video, the error comes:

Hi - that screenshot link is fixed now