I think I may have cracked this, not sure
. Trawling around various forums I have found that Bacula is different from Backup Exec, so I have had a steep learning curve. Basically to have a daily tape rotation you cannot use just the one pool, so I have had to add 5 pools and set a maximum of 2 tapes per pool. I have had to schedule 5 different weekly jobs to run through Monday to Friday and each pointing to their correct pools.
If this turns out to be spot on, I will have daily backups each using different tapes and a cycle of 10 days. I shall let you guys know how I got on.