Thanks very much for the responses. I've also found a US OHSA guideline suggesting aisles be a min of 3ft wider than the widest truck required to pass through the aisle.
I raised the issue and the companys response was "it's not a highway, there are no regulations". However,we've recently had a visit from Labour Canada where they had some issues with the forklift safety, so I'm currently searching out as much infomation as I can find to propose a safer more comprehensive policy than the one that is presently being ignored.
Once again thank you very much your responses have been extremely helpful.
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.