The usb external harddrive was orginally VFAT which I reformatted as Ext3.
Even as Ext3 format the permissions are been altered.
I'm in process of using the excellent System Rescue Linux CD
www.sysresccd.org in order to take a ghost image of the data, which I'm sure will matain file permissions and the company's filenaming. Fingers crossed.
I've advised them they seriously need to consider a defined naming standard without using special characters in filenames to be adopted throught their offices and some form of redundancy backup system.
Cheers for the reply