Help with mirroring objects and following movement of vertices

Wow, lol, that was long winded.

Ok Simply put I want to make an object’s vertex on one side mirror what the vertex on the other side of that object does, but do this with every vertex going down each side of that object.

(See pics for example)
This side follows


This side

Any help would greatly make my day :slight_smile:

Thanks in advance :smiley: