Have you been banned for one offence and then banned for a second offence where the second ban is running alongside the first?
If so then it would depend how long the second ban is for. If the second ban is for a period in excess of 2 years then you can apply for an early return of your licence at the 2 year point but no sooner. The only other right of appeal in respect of the ban imposed would have to have been lodged with the court within 21 days of the original decision made by the court.