Coincidentally I was just reading that article and was coming back to edit my post, but too late!
Is everything else ok though, apart from the need to set the log to append, not overwrite?
Set your backups to back up to individual files, preferably with the date as part of the name.
This is interesting; is that standard practice? Having had a poke around here, that's definitely not what they've done here, and not in my last place either. If it's best practice I'd like to do it.
Many thanks again.