Question Objects appearing in game view but not scene view

Hi
As you can see in the image, when I run my scene I get objects appearing in game mode (left) that don't appear in editor mode (right).

I have tried hide/show of all my objects in the project hierarchy but there are a lot so can't do them invidually. This didn't make the object disappear that shouldn't be there

I only vaguely recognise the rogue objects so can't manually find them in my project

There are no other scenes loaded in the hierarchy

Any suggestions on how to fix would be gratefully received

thanks

 

Edit - I have found the offending objects by trawling through my hierarchy but am wondering why these objects appeared in game view but not scene view - so would love to know how this happened if you have the time
thanks