The calculated distance (air line) between Potters Bar and Stoke-on-Trent is approximately 124 miles respectively 200 kilometers.
By car or train, the actual journey to Stoke-on-Trent is certainly longer, as only the direct route (as the crow flies) between Potters Bar and Stoke-on-Trent has been calculated here.
Air line (approximately)
200 kilometers
108 nautical miles