Ethel is right. You have a duty as an employer to ensure that your employees who are driving your company�s vehicles hold a licence and are not disqualified from holding or obtaining one. Many employers do an annual check. Apart from the disqualification issue, you should also check if any endorsements have been added as this may affect your company�s insurance premium.
Any insurance cover is invalidated if the driver is disqualified so you may find your company or yourself liable for a hefty bill if this individual is disqualified and is involved in an accident.