The calculated distance (air line) between Gerrards Cross and Stoke-on-Trent is approximately 120 miles respectively 193 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 Gerrards Cross and Stoke-on-Trent has been calculated here.
Air line (approximately)
193 kilometers
104 nautical miles