Source data moving

Hi,

I have a simple formula that copies a number from one (master) workbook to another (=\\file ref\\cell ref).
When the master is updated the new figure copies across to the destination workbook, which is what I want it to do, however when the cell on the master workbook moves (which it will do) the copy data is lost. Is there a way that I can update the formula to "follow" the moved cell on the source workbook?

Thanks,
Ben