"Tim Smith" wrote in message
...
So far I submitted the calcs to the BCO and he has passed back some
comments
but nothing more.

What I would like to do is submit different calcs for slightly differnet
way
of doing the work. Surely the fee is for the visiting site etc.

Not quite - but I don't see your case as requiring another fee. If you had
asked the BCO to do the calcs from your plans ("Full Plans") then that would
be a different matter altogether.