Yes, the DfT are very good with this. And it's free.
There are limits - from memory you have to be an owner or one of a max 4 owners, or (if ltd co owned) one of a max 4 Directors. But I have known of approvals being granted for more remote scenarios. For training purposes only, this is...
DfT Minster House
These permits were ignored (and unenforced) before c. 2005 but since then they have seemingly been keeping tabs on the stuff.