The calculated distance (air line) between Greenhithe and Stoke-on-Trent is approximately 150 miles respectively 241 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 Greenhithe and Stoke-on-Trent has been calculated here.
Air line (approximately)
241 kilometers
130 nautical miles