Speeding

I was driving a Renault Traffic Minibus which is registered with the local authority to carry eight passengers as a private hire vehicle. I was driving along a single carriage road with a national speed limit of 60mph. I was recorded as driving at a speed of 61mph but apparently my class of vehicle allows a speed of 50mph. This was news to me and my Boss. I understand now that panel vans of my vehicle are subject to this speed limit. However minibuses are not clearly defined in the highway code. Several internet sites describe a minibus as a vehicle capable of carrying nine or more passengers. As stated above my vehicle can only carry eight so it is not classed as a passenger carrying vehicle.

By coincidence the log book shows this vehicle as a panel van as it was converted from new by the manufactureres. If i am still subject to the 50mph limit that is fine with me. You learn from experience. I have been offered a speed awareness course which i would like to take up if i am culpable. However i only have seven days in which to take up this offer.

I would be very grateful if you could advise me in this matter.